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	<id>https://wiki.bbchallenge.org/w/index.php?action=history&amp;feed=atom&amp;title=Bigfoot</id>
	<title>Bigfoot - Revision history</title>
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	<updated>2026-04-30T17:51:00Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=4371&amp;oldid=prev</id>
		<title>MrSolis: :(</title>
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		<updated>2025-10-07T22:07:22Z</updated>

		<summary type="html">&lt;p&gt;:(&lt;/p&gt;
&lt;a href=&quot;https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;amp;diff=4371&amp;amp;oldid=4368&quot;&gt;Show changes&lt;/a&gt;</summary>
		<author><name>MrSolis</name></author>
	</entry>
	<entry>
		<id>https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=4368&amp;oldid=prev</id>
		<title>RobinCodes: /* Analysis */ Attempted fix for &quot;math input error&quot; for this page</title>
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		<updated>2025-10-07T19:45:14Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Analysis: &lt;/span&gt; Attempted fix for &amp;quot;math input error&amp;quot; for this page&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 19:45, 7 October 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l25&quot;&gt;Line 25:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 25:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Analysis ==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Analysis ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Let &amp;lt;math&amp;gt;A(a,b,c):=0^\infty\;12^a\;1^{2b}\;\&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;textrm&lt;/del&gt;{&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;&lt;/del&gt;A}\;1^{2c}\;0^\infty&amp;lt;/math&amp;gt;. Then,&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Let &amp;lt;math&amp;gt;A(a,b,c):=0^\infty\;12^a\;1^{2b}\;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;&lt;/ins&gt;\&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;text&lt;/ins&gt;{A}\;1^{2c}\;0^\infty&amp;lt;/math&amp;gt;. Then,&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math display=&quot;block&quot;&amp;gt;\begin{array}{|l l l|}\hline A(a,6b,c)&amp;amp;\xrightarrow{4a+(2b+1)48b+(12b+1)2c+13}&amp;amp;A(a,8b+c-1,2),\\A(a,6b+1,c)&amp;amp;\xrightarrow{4a+(6b+5)16b+(4b+1)6c+29}&amp;amp;A(a+1,8b+c-1,3),\\A(0,6b+2,c)&amp;amp;\xrightarrow{(b+1)96b+(3b+1)8c+18}&amp;amp;0^\infty\;\&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;textrm&lt;/del&gt;{&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;&lt;/del&gt;C}\;1^{16b+2c+5}\;2\;0^\infty,\\A(a,6b+2,c)&amp;amp;\xrightarrow{4a+(2b+3)48b+(12b+7)2c+51}&amp;amp;A(a-1,8b+c+3,2)\text{ if }a\ge1,\\A(a,6b+3,c)&amp;amp;\xrightarrow{4a+(6b+7)16b+(12b+5)2c+91}&amp;amp;A(a,8b+c+1,5),\\A(a,6b+4,c)&amp;amp;\xrightarrow{4a+(2b+3)48b+(12b+7)2c+63}&amp;amp;A(a+1,8b+c+3,2),\\A(a,6b+5,c)&amp;amp;\xrightarrow{4a+(6b+11)16b+(4b+3)6c+103}&amp;amp;A(a,8b+c+5,3).\\\hline\end{array}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math display=&quot;block&quot;&amp;gt;\begin{array}{|l l l|}\hline A(a,6b,c)&amp;amp;\xrightarrow{4a+(2b+1)48b+(12b+1)2c+13}&amp;amp;A(a,8b+c-1,2),\\A(a,6b+1,c)&amp;amp;\xrightarrow{4a+(6b+5)16b+(4b+1)6c+29}&amp;amp;A(a+1,8b+c-1,3),\\A(0,6b+2,c)&amp;amp;\xrightarrow{(b+1)96b+(3b+1)8c+18}&amp;amp;0^\infty\;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;&lt;/ins&gt;\&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;text&lt;/ins&gt;{C}\;1^{16b+2c+5}\;2\;0^\infty,\\A(a,6b+2,c)&amp;amp;\xrightarrow{4a+(2b+3)48b+(12b+7)2c+51}&amp;amp;A(a-1,8b+c+3,2)\text{ if }a\ge1,\\A(a,6b+3,c)&amp;amp;\xrightarrow{4a+(6b+7)16b+(12b+5)2c+91}&amp;amp;A(a,8b+c+1,5),\\A(a,6b+4,c)&amp;amp;\xrightarrow{4a+(2b+3)48b+(12b+7)2c+63}&amp;amp;A(a+1,8b+c+3,2),\\A(a,6b+5,c)&amp;amp;\xrightarrow{4a+(6b+11)16b+(4b+3)6c+103}&amp;amp;A(a,8b+c+5,3).\\\hline\end{array}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;div class=&amp;quot;toccolours mw-collapsible mw-collapsed&amp;quot;&amp;gt;&amp;#039;&amp;#039;&amp;#039;Proof&amp;#039;&amp;#039;&amp;#039;&amp;lt;div class=&amp;quot;mw-collapsible-content&amp;quot;&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;div class=&amp;quot;toccolours mw-collapsible mw-collapsed&amp;quot;&amp;gt;&amp;#039;&amp;#039;&amp;#039;Proof&amp;#039;&amp;#039;&amp;#039;&amp;lt;div class=&amp;quot;mw-collapsible-content&amp;quot;&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;For now, we will work with the slightly different configuration &amp;lt;math&amp;gt;A&amp;#039;(a,b,c):=0^\infty\;12^a\;1^b\;\textrm{&amp;lt;A}\;1^c\;0^\infty&amp;lt;/math&amp;gt;. Consider the partial configuration &amp;lt;math&amp;gt;P(m,n):=1^m\;\textrm{&amp;lt;A}\;1^n\;0^\infty&amp;lt;/math&amp;gt;. We first require the following shift rule:&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;For now, we will work with the slightly different configuration &amp;lt;math&amp;gt;A&amp;#039;(a,b,c):=0^\infty\;12^a\;1^b\;\textrm{&amp;lt;A}\;1^c\;0^\infty&amp;lt;/math&amp;gt;. Consider the partial configuration &amp;lt;math&amp;gt;P(m,n):=1^m\;\textrm{&amp;lt;A}\;1^n\;0^\infty&amp;lt;/math&amp;gt;. We first require the following shift rule:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l42&quot;&gt;Line 42:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 42:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#If &amp;lt;math&amp;gt;b\equiv0\ (\operatorname{mod}12)&amp;lt;/math&amp;gt;, then in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;{\displaystyle\sum_{i=0}^{b/12-1}}(6(16i+c)+43+6(16i+11+c)+19)={\displaystyle\sum_{i=0}^{b/12-1}}4(48i+3c+32)=\frac{2}{3}b^2+\frac{8}{3}b+bc&amp;lt;/math&amp;gt; steps we arrive at &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;P\Big(0,16\times\frac{b}{12}+c\Big)&amp;lt;/math&amp;gt;, or &amp;lt;math&amp;gt;0^\infty\;12^a\;\textrm{&amp;lt;A}\;1^{4b/3+c}\;0^\infty&amp;lt;/math&amp;gt; when considering the complete configuration. What follows is:&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\begin{array}{|l|}\hline0^\infty\;12^a\;\textrm{&amp;lt;A}\;1^{4b/3+c}\;0^\infty\xrightarrow{2a}0^\infty\;\textrm{&amp;lt;A}\;21^a\;1^{4b/3+c}\;0^\infty\xrightarrow{1}0^\infty\;1\;\textrm{B&amp;gt;}\;21^a\;1^{4b/3+c}\;0^\infty\xrightarrow{2a+4b/3+c}\\0^\infty\;12^a\;1^{4b/3+c+1}\;\textrm{B&amp;gt;}\;0^\infty\xrightarrow{12}0^\infty\;12^a\;1^{4b/3+c-2}\;\textrm{&amp;lt;A}\;1^4\;0^\infty\\\hline\end{array}&amp;lt;/math&amp;gt;This means that if &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;\frac{4}{3}b+c\ge2&amp;lt;/math&amp;gt;, then we will reach &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;A&amp;#039;\Big(a,\frac{4}{3}b+c-2,4\Big)&amp;lt;/math&amp;gt; in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;4a+\frac{2}{3}b^2+4b+bc+c+13&amp;lt;/math&amp;gt; steps.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#If &amp;lt;math&amp;gt;b\equiv0\ (\operatorname{mod}12)&amp;lt;/math&amp;gt;, then in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;{\displaystyle\sum_{i=0}^{b/12-1}}(6(16i+c)+43+6(16i+11+c)+19)={\displaystyle\sum_{i=0}^{b/12-1}}4(48i+3c+32)=\frac{2}{3}b^2+\frac{8}{3}b+bc&amp;lt;/math&amp;gt; steps we arrive at &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;P\Big(0,16\times\frac{b}{12}+c\Big)&amp;lt;/math&amp;gt;, or &amp;lt;math&amp;gt;0^\infty\;12^a\;\textrm{&amp;lt;A}\;1^{4b/3+c}\;0^\infty&amp;lt;/math&amp;gt; when considering the complete configuration. What follows is:&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\begin{array}{|l|}\hline0^\infty\;12^a\;\textrm{&amp;lt;A}\;1^{4b/3+c}\;0^\infty\xrightarrow{2a}0^\infty\;\textrm{&amp;lt;A}\;21^a\;1^{4b/3+c}\;0^\infty\xrightarrow{1}0^\infty\;1\;\textrm{B&amp;gt;}\;21^a\;1^{4b/3+c}\;0^\infty\xrightarrow{2a+4b/3+c}\\0^\infty\;12^a\;1^{4b/3+c+1}\;\textrm{B&amp;gt;}\;0^\infty\xrightarrow{12}0^\infty\;12^a\;1^{4b/3+c-2}\;\textrm{&amp;lt;A}\;1^4\;0^\infty\\\hline\end{array}&amp;lt;/math&amp;gt;This means that if &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;\frac{4}{3}b+c\ge2&amp;lt;/math&amp;gt;, then we will reach &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;A&amp;#039;\Big(a,\frac{4}{3}b+c-2,4\Big)&amp;lt;/math&amp;gt; in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;4a+\frac{2}{3}b^2+4b+bc+c+13&amp;lt;/math&amp;gt; steps.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#If &amp;lt;math&amp;gt;b\equiv2\ (\operatorname{mod}12)&amp;lt;/math&amp;gt;, then in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;{\displaystyle\sum_{i=0}^{(b-2)/12-1}}4(48i+3c+32)=\frac{2}{3}b^2+bc-2c-\frac{8}{3}&amp;lt;/math&amp;gt; steps we arrive at &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;P\Big(2,\frac{4(b-2)}{3}+c\Big)&amp;lt;/math&amp;gt;, or &amp;lt;math&amp;gt;0^\infty\;12^a\;11\;\textrm{&amp;lt;A}\;1^{(4b-2)/3+c}\;0^\infty&amp;lt;/math&amp;gt;. What follows is:&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\begin{array}{|l|}\hline0^\infty\;12^a\;11\;\textrm{&amp;lt;A}\;1^{4(b-2)/3+c}\;0^\infty\xrightarrow{4(b-2)/3+c+1}0^\infty\;12^a\;1\;2^{4(b-2)/3+c+1}\;\textrm{A&amp;gt;}\;0^\infty\xrightarrow{4}\\0^\infty\;12^a\;1\;2^{4(b-2)/3+c}\;\textrm{&amp;lt;C}\;122\;0^\infty\xrightarrow{4(b-2)/3+c}0^\infty\;12^a\;1\;\textrm{&amp;lt;C}\;1^{4(b-2)/3+c+1}\;22\;0^\infty\xrightarrow{1}\\0^\infty\;12^a\;\textrm{&amp;lt;A}\;2\;1^{4(b-2)/3+c+1}\;22\;0^\infty\xrightarrow{2a}0^\infty\;\textrm{&amp;lt;A}\;21^a\;2\;1^{4(b-2)/3+c+1}\;22\;0^\infty\xrightarrow{1}\\0^\infty\;1\;\textrm{B&amp;gt;}\;21^a\;2\;1^{4(b-2)/3+c+1}\;22\;0^\infty\xrightarrow{4(b-2)/3+2a+c+4}0^\infty\;12^{a+1}\;1^{4(b-2)/3+c+1}\;22\;\textrm{B&amp;gt;}\;0^\infty\xrightarrow{18}\\0^\infty\;12^{a+1}\;1^{4(b-2)/3+c-2}\;\textrm{&amp;lt;A}\;1^6\;0^\infty\\\hline\end{array}&amp;lt;/math&amp;gt;This means that if &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;\frac{4(b-2)}{3}+c\ge 2&amp;lt;/math&amp;gt;, then we will reach &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;A&amp;#039;\Big(a+1,\frac{4b-14}{3}+c,6\Big)&amp;lt;/math&amp;gt; in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;4a+\frac{2}{3}b^2+4b+bc+c+\frac{55}{3}&amp;lt;/math&amp;gt; steps.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#If &amp;lt;math&amp;gt;b\equiv2\ (\operatorname{mod}12)&amp;lt;/math&amp;gt;, then in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;{\displaystyle\sum_{i=0}^{(b-2)/12-1}}4(48i+3c+32)=\frac{2}{3}b^2+bc-2c-\frac{8}{3}&amp;lt;/math&amp;gt; steps we arrive at &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;P\Big(2,\frac{4(b-2)}{3}+c\Big)&amp;lt;/math&amp;gt;, or &amp;lt;math&amp;gt;0^\infty\;12^a\;11\;\textrm{&amp;lt;A}\;1^{(4b-2)/3+c}\;0^\infty&amp;lt;/math&amp;gt;. What follows is:&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\begin{array}{|l|}\hline0^\infty\;12^a\;11\;\textrm{&amp;lt;A}\;1^{4(b-2)/3+c}\;0^\infty\xrightarrow{4(b-2)/3+c+1}0^\infty\;12^a\;1\;2^{4(b-2)/3+c+1}\;\textrm{A&amp;gt;}\;0^\infty\xrightarrow{4}\\0^\infty\;12^a\;1\;2^{4(b-2)/3+c}\;\textrm{&amp;lt;C}\;122\;0^\infty\xrightarrow{4(b-2)/3+c}0^\infty\;12^a\;1\;\textrm{&amp;lt;C}\;1^{4(b-2)/3+c+1}\;22\;0^\infty\xrightarrow{1}\\0^\infty\;12^a\;\textrm{&amp;lt;A}\;2\;1^{4(b-2)/3+c+1}\;22\;0^\infty\xrightarrow{2a}0^\infty\;\textrm{&amp;lt;A}\;21^a\;2\;1^{4(b-2)/3+c+1}\;22\;0^\infty\xrightarrow{1}\\0^\infty\;1\;\textrm{B&amp;gt;}\;21^a\;2\;1^{4(b-2)/3+c+1}\;22\;0^\infty\xrightarrow{4(b-2)/3+2a+c+4}0^\infty\;12^{a+1}\;1^{4(b-2)/3+c+1}\;22\;\textrm{B&amp;gt;}\;0^\infty\xrightarrow{18}\\0^\infty\;12^{a+1}\;1^{4(b-2)/3+c-2}\;\textrm{&amp;lt;A}\;1^6\;0^\infty\\\hline\end{array}&amp;lt;/math&amp;gt;This means that if &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;\frac{4(b-2)}{3}+c\ge 2&amp;lt;/math&amp;gt;, then we will reach &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;A&amp;#039;\Big(a+1,\frac{4b-14}{3}+c,6\Big)&amp;lt;/math&amp;gt; in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;4a+\frac{2}{3}b^2+4b+bc+c+\frac{55}{3}&amp;lt;/math&amp;gt; steps.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#If &amp;lt;math&amp;gt;b\equiv4\ (\operatorname{mod}12)&amp;lt;/math&amp;gt;, then in &amp;lt;math display=&quot;inline&amp;gt;\frac{2}{3}b^2-\frac{8}{3}b+bc-4c&amp;lt;/math&amp;gt; steps we arrive at &amp;lt;math display=&quot;inline&quot;&amp;gt;P\Big(4,\frac{4(b-4)}{3}+c\Big)&amp;lt;/math&amp;gt;, or &amp;lt;math&amp;gt;0^\infty\;12^a\;1111\;\textrm{&amp;lt;A}\;1^{4(b-4)/3+c}\;0^\infty&amp;lt;/math&amp;gt;. What follows is:&amp;lt;math display=&quot;block&quot;&amp;gt;\begin{array}{|l|}\hline0^\infty\;12^a\;1111\;\textrm{&amp;lt;A}\;1^{4(b-4)/3+c}\;0^\infty\xrightarrow{(8b-14)/3+2c}0^\infty\;12^a\;11\;\textrm{&amp;lt;A}\;2\;1^{4(b-4)/3+c+1}\;22\;0^\infty\xrightarrow{3}\\0^\infty\;12^a\;1\;\textrm{&amp;lt;A}\;1^{4(b-4)/3+c+3}\;22\;0^\infty\xrightarrow{4(b-4)/3+c+4}0^\infty\;12^a\;2^{4(b-4)/3+c+4}\;\textrm{A&amp;gt;}\;22\;0^\infty\xrightarrow{1}\\0^\infty\;12^a\;2^{4(b-4)/3+c+4}\;\textrm{&amp;lt;C}\;12\;0^\infty\xrightarrow{4(b-4)/3+c+4}0^\infty\;12^a\;\textrm{&amp;lt;C}\;1^{4(b-4)/3+c+5}\;2\;0^\infty\xrightarrow{1}\\0^\infty\;12^{a-1}\;1\;\textrm{&amp;lt;A}\;1^{4(b-4)/3+c+6}\;2\;0^\infty\xrightarrow{4(b-4)/3+c+7}0^\infty\;12^{a-1}\;2^{4(b-4)/3+c+7}\;\textrm{A&amp;gt;}\;2\;0^\infty\xrightarrow{1}\\0^\infty\;12^{a-1}\;2^{4(b-4)/3+c+7}\;\textrm{&amp;lt;C}\;1\;0^\infty\xrightarrow{4(b-4)/3+c+6}0^\infty\;12^{a-1}\;2\;\textrm{&amp;lt;C}\;1^{4(b-4)/3+c+7}\;0^\infty\xrightarrow{1}\\0^\infty\;12^{a-1}\;\textrm{&amp;lt;A}\;1^{4(b-4)/3+c+8}\;0^\infty\xrightarrow{2(a-1)}0^\infty\;\textrm{&amp;lt;A}\;21^{a-1}\;1^{4(b-4)/3+c+8}\;0^\infty\xrightarrow{1}\\0^\infty\;1\;\textrm{B&amp;gt;}\;21^{a-1}\;1^{4(b-4)/3+c+8}\;0^\infty\xrightarrow{2a+4(b-4)/3+c+6}0^\infty\;12^{a-1}\;1^{4(b-4)/3+c+9}\;\textrm{B&amp;gt;}\;0^\infty\xrightarrow{12}\\0^\infty\;12^{a-1}\;1^{4(b-4)/3+c+6}\;\textrm{&amp;lt;A}\;1^4\;0^\infty\\\hline\end{array}&amp;lt;/math&amp;gt;This means that if &amp;lt;math&amp;gt;a=0&amp;lt;/math&amp;gt;, then Bigfoot will reach the undefined &amp;lt;code&amp;gt;C0&amp;lt;/code&amp;gt; transition with the configuration &amp;lt;math&amp;gt;0^\infty\;\textrm{&amp;lt;C}\;1^{(4b-1)/3+c}\;2\;0^\infty&amp;lt;/math&amp;gt; in &amp;lt;math display=&quot;inline&quot;&amp;gt;\frac{2}{3}b^2+\frac{8}{3}b+bc-\frac{10}{3}&amp;lt;/math&amp;gt; steps. Otherwise, it will proceed to reach &amp;lt;math display=&quot;inline&quot;&amp;gt;A&#039;\Big(a-1,\frac{4b+2}{3}+c,4\Big)&amp;lt;/math&amp;gt; in &amp;lt;math display=&quot;inline&quot;&amp;gt;4a+\frac{2}{3}b^2+\frac{20}{3}b+bc+3c+\frac{41}{3}&amp;lt;/math&amp;gt; steps.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#If &amp;lt;math&amp;gt;b\equiv4\ (\operatorname{mod}12)&amp;lt;/math&amp;gt;, then in &amp;lt;math display=&quot;inline&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&quot;&lt;/ins&gt;&amp;gt;\frac{2}{3}b^2-\frac{8}{3}b+bc-4c&amp;lt;/math&amp;gt; steps we arrive at &amp;lt;math display=&quot;inline&quot;&amp;gt;P\Big(4,\frac{4(b-4)}{3}+c\Big)&amp;lt;/math&amp;gt;, or &amp;lt;math&amp;gt;0^\infty\;12^a\;1111\;\textrm{&amp;lt;A}\;1^{4(b-4)/3+c}\;0^\infty&amp;lt;/math&amp;gt;. What follows is:&amp;lt;math display=&quot;block&quot;&amp;gt;\begin{array}{|l|}\hline0^\infty\;12^a\;1111\;\textrm{&amp;lt;A}\;1^{4(b-4)/3+c}\;0^\infty\xrightarrow{(8b-14)/3+2c}0^\infty\;12^a\;11\;\textrm{&amp;lt;A}\;2\;1^{4(b-4)/3+c+1}\;22\;0^\infty\xrightarrow{3}\\0^\infty\;12^a\;1\;\textrm{&amp;lt;A}\;1^{4(b-4)/3+c+3}\;22\;0^\infty\xrightarrow{4(b-4)/3+c+4}0^\infty\;12^a\;2^{4(b-4)/3+c+4}\;\textrm{A&amp;gt;}\;22\;0^\infty\xrightarrow{1}\\0^\infty\;12^a\;2^{4(b-4)/3+c+4}\;\textrm{&amp;lt;C}\;12\;0^\infty\xrightarrow{4(b-4)/3+c+4}0^\infty\;12^a\;\textrm{&amp;lt;C}\;1^{4(b-4)/3+c+5}\;2\;0^\infty\xrightarrow{1}\\0^\infty\;12^{a-1}\;1\;\textrm{&amp;lt;A}\;1^{4(b-4)/3+c+6}\;2\;0^\infty\xrightarrow{4(b-4)/3+c+7}0^\infty\;12^{a-1}\;2^{4(b-4)/3+c+7}\;\textrm{A&amp;gt;}\;2\;0^\infty\xrightarrow{1}\\0^\infty\;12^{a-1}\;2^{4(b-4)/3+c+7}\;\textrm{&amp;lt;C}\;1\;0^\infty\xrightarrow{4(b-4)/3+c+6}0^\infty\;12^{a-1}\;2\;\textrm{&amp;lt;C}\;1^{4(b-4)/3+c+7}\;0^\infty\xrightarrow{1}\\0^\infty\;12^{a-1}\;\textrm{&amp;lt;A}\;1^{4(b-4)/3+c+8}\;0^\infty\xrightarrow{2(a-1)}0^\infty\;\textrm{&amp;lt;A}\;21^{a-1}\;1^{4(b-4)/3+c+8}\;0^\infty\xrightarrow{1}\\0^\infty\;1\;\textrm{B&amp;gt;}\;21^{a-1}\;1^{4(b-4)/3+c+8}\;0^\infty\xrightarrow{2a+4(b-4)/3+c+6}0^\infty\;12^{a-1}\;1^{4(b-4)/3+c+9}\;\textrm{B&amp;gt;}\;0^\infty\xrightarrow{12}\\0^\infty\;12^{a-1}\;1^{4(b-4)/3+c+6}\;\textrm{&amp;lt;A}\;1^4\;0^\infty\\\hline\end{array}&amp;lt;/math&amp;gt;This means that if &amp;lt;math&amp;gt;a=0&amp;lt;/math&amp;gt;, then Bigfoot will reach the undefined &amp;lt;code&amp;gt;C0&amp;lt;/code&amp;gt; transition with the configuration &amp;lt;math&amp;gt;0^\infty\;\textrm{&amp;lt;C}\;1^{(4b-1)/3+c}\;2\;0^\infty&amp;lt;/math&amp;gt; in &amp;lt;math display=&quot;inline&quot;&amp;gt;\frac{2}{3}b^2+\frac{8}{3}b+bc-\frac{10}{3}&amp;lt;/math&amp;gt; steps. Otherwise, it will proceed to reach &amp;lt;math display=&quot;inline&quot;&amp;gt;A&#039;\Big(a-1,\frac{4b+2}{3}+c,4\Big)&amp;lt;/math&amp;gt; in &amp;lt;math display=&quot;inline&quot;&amp;gt;4a+\frac{2}{3}b^2+\frac{20}{3}b+bc+3c+\frac{41}{3}&amp;lt;/math&amp;gt; steps.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#If &amp;lt;math&amp;gt;b\equiv6\ (\operatorname{mod}12)&amp;lt;/math&amp;gt;, then in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;\frac{2}{3}b^2-\frac{16}{3}b+bc-6c+8&amp;lt;/math&amp;gt; steps we arrive at &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;P\Big(6,\frac{4(b-6)}{3}+c\Big)&amp;lt;/math&amp;gt;, or &amp;lt;math&amp;gt;0^\infty\;12^a\;111111\;\textrm{&amp;lt;A}\;1^{4(b-6)/3+c}\;0^\infty&amp;lt;/math&amp;gt;. What follows is:&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\begin{array}{|l|}\hline0^\infty\;12^a\;111111\;\textrm{&amp;lt;A}\;1^{4(b-6)/3+c}\;0^\infty\xrightarrow{16b/3+4c-14}0^\infty\;12^a\;11\;\textrm{&amp;lt;C}\;1^{4(b-6)/3+c+5}\;2\;0^\infty\xrightarrow{4}\\0^\infty\;12^a\;\textrm{&amp;lt;A}\;1^{4(b-6)/3+c+7}\;2\;0^\infty\xrightarrow{2a}0^\infty\;\textrm{&amp;lt;A}\;21^a\;1^{4(b-6)/3+c+7}\;2\;0^\infty\xrightarrow{1}\\0^\infty\;1\;\textrm{B&amp;gt;}\;21^a\;1^{4(b-6)/3+c+7}\;2\;0^\infty\xrightarrow{2a+4(b-6)/3+c+8}0^\infty\;12^a\;1^{4(b-6)/3+c+8}\;2\;\textrm{B&amp;gt;}\;0^\infty\xrightarrow{60}\\0^\infty\;12^a\;1^{4(b-6)/3+c+2}\;\textrm{&amp;lt;A}\;1^{10}\;0^\infty\\\hline\end{array}&amp;lt;/math&amp;gt;This means that we will reach &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;A&amp;#039;\Big(a,\frac{4}{3}b+c-6,10\Big)&amp;lt;/math&amp;gt; in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;4a+\frac{2}{3}b^2+\frac{4}{3}b+bc-c+59&amp;lt;/math&amp;gt; steps.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#If &amp;lt;math&amp;gt;b\equiv6\ (\operatorname{mod}12)&amp;lt;/math&amp;gt;, then in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;\frac{2}{3}b^2-\frac{16}{3}b+bc-6c+8&amp;lt;/math&amp;gt; steps we arrive at &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;P\Big(6,\frac{4(b-6)}{3}+c\Big)&amp;lt;/math&amp;gt;, or &amp;lt;math&amp;gt;0^\infty\;12^a\;111111\;\textrm{&amp;lt;A}\;1^{4(b-6)/3+c}\;0^\infty&amp;lt;/math&amp;gt;. What follows is:&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\begin{array}{|l|}\hline0^\infty\;12^a\;111111\;\textrm{&amp;lt;A}\;1^{4(b-6)/3+c}\;0^\infty\xrightarrow{16b/3+4c-14}0^\infty\;12^a\;11\;\textrm{&amp;lt;C}\;1^{4(b-6)/3+c+5}\;2\;0^\infty\xrightarrow{4}\\0^\infty\;12^a\;\textrm{&amp;lt;A}\;1^{4(b-6)/3+c+7}\;2\;0^\infty\xrightarrow{2a}0^\infty\;\textrm{&amp;lt;A}\;21^a\;1^{4(b-6)/3+c+7}\;2\;0^\infty\xrightarrow{1}\\0^\infty\;1\;\textrm{B&amp;gt;}\;21^a\;1^{4(b-6)/3+c+7}\;2\;0^\infty\xrightarrow{2a+4(b-6)/3+c+8}0^\infty\;12^a\;1^{4(b-6)/3+c+8}\;2\;\textrm{B&amp;gt;}\;0^\infty\xrightarrow{60}\\0^\infty\;12^a\;1^{4(b-6)/3+c+2}\;\textrm{&amp;lt;A}\;1^{10}\;0^\infty\\\hline\end{array}&amp;lt;/math&amp;gt;This means that we will reach &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;A&amp;#039;\Big(a,\frac{4}{3}b+c-6,10\Big)&amp;lt;/math&amp;gt; in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;4a+\frac{2}{3}b^2+\frac{4}{3}b+bc-c+59&amp;lt;/math&amp;gt; steps.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#If &amp;lt;math&amp;gt;b\equiv8\ (\operatorname{mod}12)&amp;lt;/math&amp;gt;, then in &amp;lt;math display=&quot;inline&amp;gt;\frac{2}{3}b^2-8b+bc-8c+\frac{64}{3}&amp;lt;/math&amp;gt; steps we arrive at &amp;lt;math display=&quot;inline&quot;&amp;gt;P\Big(8,\frac{4(b-8)}{3}+c\Big)&amp;lt;/math&amp;gt;, or &amp;lt;math&amp;gt;0^\infty\;12^a\;1^8\;\textrm{&amp;lt;A}\;1^{4(b-8)/3+c}\;0^\infty&amp;lt;/math&amp;gt;. What follows is:&amp;lt;math display=&quot;block&quot;&amp;gt;\begin{array}{|l|}\hline0^\infty\;12^a\;1^8\;\textrm{&amp;lt;A}\;1^{4(b-8)/3+c}\;0^\infty\xrightarrow{(16b-62)/3+4c}0^\infty\;12^a\;11\;\textrm{&amp;lt;A}\;1^{4(b-8)/3+c+7}\;2\;0^\infty\xrightarrow{4(b-8)/3+c+8}\\0^\infty\;12^a\;1\;2^{4(b-8)/3+c+8}\;\textrm{A&amp;gt;}\;2\;0^\infty\xrightarrow{1}0^\infty\;12^a\;1\;2^{4(b-8)/3+c+8}\;\textrm{&amp;lt;C}\;1\;0^\infty\xrightarrow{4(b-8)/3+c+8}\\0^\infty\;12^a\;1\;\textrm{&amp;lt;C}\;1^{4(b-8)/3+c+9}\;0^\infty\xrightarrow{1}0^\infty\;12^a\;\textrm{&amp;lt;A}\;2\;1^{4(b-8)/3+c+9}\;0^\infty\xrightarrow{2a}\\0^\infty\;\textrm{&amp;lt;A}\;21^a\;2\;1^{4(b-8)/3+c+9}\;0^\infty\xrightarrow{1}0^\infty\;1\;\textrm{B&amp;gt;}\;21^a\;2\;1^{4(b-8)/3+c+9}\;0^\infty\xrightarrow{2a+4(b-8)/3+c+10}\\0^\infty\;12^{a+1}\;1^{4(b-8)/3+c+9}\;\textrm{B&amp;gt;}\;0^\infty\xrightarrow{12}0^\infty\;12^{a+1}\;1^{4(b-8)/3+c+6}\;\textrm{&amp;lt;A}\;1^4\;0^\infty\\\hline\end{array}&amp;lt;/math&amp;gt;This means that we will reach &amp;lt;math display=&quot;inline&quot;&amp;gt;A&#039;\Big(a+1,\frac{4b-14}{3}+c,4\Big)&amp;lt;/math&amp;gt; in &amp;lt;math display=&quot;inline&quot;&amp;gt;4a+\frac{2}{3}b^2+\frac{4}{3}b+bc-c+\frac{29}{3}&amp;lt;/math&amp;gt; steps.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#If &amp;lt;math&amp;gt;b\equiv8\ (\operatorname{mod}12)&amp;lt;/math&amp;gt;, then in &amp;lt;math display=&quot;inline&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&quot;&lt;/ins&gt;&amp;gt;\frac{2}{3}b^2-8b+bc-8c+\frac{64}{3}&amp;lt;/math&amp;gt; steps we arrive at &amp;lt;math display=&quot;inline&quot;&amp;gt;P\Big(8,\frac{4(b-8)}{3}+c\Big)&amp;lt;/math&amp;gt;, or &amp;lt;math&amp;gt;0^\infty\;12^a\;1^8\;\textrm{&amp;lt;A}\;1^{4(b-8)/3+c}\;0^\infty&amp;lt;/math&amp;gt;. What follows is:&amp;lt;math display=&quot;block&quot;&amp;gt;\begin{array}{|l|}\hline0^\infty\;12^a\;1^8\;\textrm{&amp;lt;A}\;1^{4(b-8)/3+c}\;0^\infty\xrightarrow{(16b-62)/3+4c}0^\infty\;12^a\;11\;\textrm{&amp;lt;A}\;1^{4(b-8)/3+c+7}\;2\;0^\infty\xrightarrow{4(b-8)/3+c+8}\\0^\infty\;12^a\;1\;2^{4(b-8)/3+c+8}\;\textrm{A&amp;gt;}\;2\;0^\infty\xrightarrow{1}0^\infty\;12^a\;1\;2^{4(b-8)/3+c+8}\;\textrm{&amp;lt;C}\;1\;0^\infty\xrightarrow{4(b-8)/3+c+8}\\0^\infty\;12^a\;1\;\textrm{&amp;lt;C}\;1^{4(b-8)/3+c+9}\;0^\infty\xrightarrow{1}0^\infty\;12^a\;\textrm{&amp;lt;A}\;2\;1^{4(b-8)/3+c+9}\;0^\infty\xrightarrow{2a}\\0^\infty\;\textrm{&amp;lt;A}\;21^a\;2\;1^{4(b-8)/3+c+9}\;0^\infty\xrightarrow{1}0^\infty\;1\;\textrm{B&amp;gt;}\;21^a\;2\;1^{4(b-8)/3+c+9}\;0^\infty\xrightarrow{2a+4(b-8)/3+c+10}\\0^\infty\;12^{a+1}\;1^{4(b-8)/3+c+9}\;\textrm{B&amp;gt;}\;0^\infty\xrightarrow{12}0^\infty\;12^{a+1}\;1^{4(b-8)/3+c+6}\;\textrm{&amp;lt;A}\;1^4\;0^\infty\\\hline\end{array}&amp;lt;/math&amp;gt;This means that we will reach &amp;lt;math display=&quot;inline&quot;&amp;gt;A&#039;\Big(a+1,\frac{4b-14}{3}+c,4\Big)&amp;lt;/math&amp;gt; in &amp;lt;math display=&quot;inline&quot;&amp;gt;4a+\frac{2}{3}b^2+\frac{4}{3}b+bc-c+\frac{29}{3}&amp;lt;/math&amp;gt; steps.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#If &amp;lt;math&amp;gt;b\equiv10\ (\operatorname{mod}12)&amp;lt;/math&amp;gt;, then in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;\frac{2}{3}b^2-\frac{32}{3}b+bc-10c+40&amp;lt;/math&amp;gt; steps we arrive at &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;P\Big(10,\frac{4(b-10)}{3}+c\Big)&amp;lt;/math&amp;gt;, or &amp;lt;math&amp;gt;0^\infty\;12^a\;1^{10}\;\textrm{&amp;lt;A}\;1^{4(b-10)/3+c}\;0^\infty&amp;lt;/math&amp;gt;. What follows is:&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\begin{array}{|l|}\hline0^\infty\;12^a\;1^{10}\;\textrm{&amp;lt;A}\;1^{4(b-  10)/3+c}\;0^\infty\xrightarrow{8b+6c-37}0^\infty\;12^a\;1\;\textrm{&amp;lt;A}\;1^{4(b-  10)/3+c+11}\;0^\infty\xrightarrow{4(b-  10)/3+c+12}\\0^\infty\;12^a\;2^{4(b-  10)/3+c+12}\;\textrm{A&amp;gt;}\;0^\infty\xrightarrow{4}0^\infty\;12^a\;2^{4(b-10)/3+c+11}\;\textrm{&amp;lt;C}\;122\;0^\infty\xrightarrow{4(b-10)/3+c+10}\\0^\infty\;12^a\;2\;\textrm{&amp;lt;C}\;1^{4(b-  10)/3+c+11}\;22\;0^\infty\xrightarrow{1}0^\infty\;12^a\;\textrm{&amp;lt;A}\;1^{4(b-10)/3+c+12}\;22\;0^\infty\xrightarrow{2a}\\0^\infty\;\textrm{&amp;lt;A}\;12^a\;1^{4(b-10)/3+c+12}\;22\;0^\infty\xrightarrow{1}0^\infty\;1\;\textrm{B&amp;gt;}\;12^a\;1^{4(b-10)/3+c+12}\;22\;0^\infty\xrightarrow{2a+4(b-10)/3+c+14}\\0^\infty\;12^a\;1^{4(b-10)/3+c+13}\;22\;\textrm{B&amp;gt;}\;0^\infty\xrightarrow{18}0^\infty\;12^a\;1^{4(b-10)/3+c+10}\;\textrm{&amp;lt;A}\;1^6\;0^\infty\\\hline\end{array}&amp;lt;/math&amp;gt;This means that we will reach &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;A&amp;#039;\Big(a,\frac{4b-10}{3}+c,6\Big)&amp;lt;/math&amp;gt; in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;4a+\frac{2}{3}b^2+\frac{4}{3}b+bc-c+23&amp;lt;/math&amp;gt; steps.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;#If &amp;lt;math&amp;gt;b\equiv10\ (\operatorname{mod}12)&amp;lt;/math&amp;gt;, then in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;\frac{2}{3}b^2-\frac{32}{3}b+bc-10c+40&amp;lt;/math&amp;gt; steps we arrive at &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;P\Big(10,\frac{4(b-10)}{3}+c\Big)&amp;lt;/math&amp;gt;, or &amp;lt;math&amp;gt;0^\infty\;12^a\;1^{10}\;\textrm{&amp;lt;A}\;1^{4(b-10)/3+c}\;0^\infty&amp;lt;/math&amp;gt;. What follows is:&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\begin{array}{|l|}\hline0^\infty\;12^a\;1^{10}\;\textrm{&amp;lt;A}\;1^{4(b-  10)/3+c}\;0^\infty\xrightarrow{8b+6c-37}0^\infty\;12^a\;1\;\textrm{&amp;lt;A}\;1^{4(b-  10)/3+c+11}\;0^\infty\xrightarrow{4(b-  10)/3+c+12}\\0^\infty\;12^a\;2^{4(b-  10)/3+c+12}\;\textrm{A&amp;gt;}\;0^\infty\xrightarrow{4}0^\infty\;12^a\;2^{4(b-10)/3+c+11}\;\textrm{&amp;lt;C}\;122\;0^\infty\xrightarrow{4(b-10)/3+c+10}\\0^\infty\;12^a\;2\;\textrm{&amp;lt;C}\;1^{4(b-  10)/3+c+11}\;22\;0^\infty\xrightarrow{1}0^\infty\;12^a\;\textrm{&amp;lt;A}\;1^{4(b-10)/3+c+12}\;22\;0^\infty\xrightarrow{2a}\\0^\infty\;\textrm{&amp;lt;A}\;12^a\;1^{4(b-10)/3+c+12}\;22\;0^\infty\xrightarrow{1}0^\infty\;1\;\textrm{B&amp;gt;}\;12^a\;1^{4(b-10)/3+c+12}\;22\;0^\infty\xrightarrow{2a+4(b-10)/3+c+14}\\0^\infty\;12^a\;1^{4(b-10)/3+c+13}\;22\;\textrm{B&amp;gt;}\;0^\infty\xrightarrow{18}0^\infty\;12^a\;1^{4(b-10)/3+c+10}\;\textrm{&amp;lt;A}\;1^6\;0^\infty\\\hline\end{array}&amp;lt;/math&amp;gt;This means that we will reach &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;A&amp;#039;\Big(a,\frac{4b-10}{3}+c,6\Big)&amp;lt;/math&amp;gt; in &amp;lt;math display=&amp;quot;inline&amp;quot;&amp;gt;4a+\frac{2}{3}b^2+\frac{4}{3}b+bc-c+23&amp;lt;/math&amp;gt; steps.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The information above can be summarized as&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The information above can be summarized as&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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&lt;/table&gt;</summary>
		<author><name>RobinCodes</name></author>
	</entry>
	<entry>
		<id>https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=3929&amp;oldid=prev</id>
		<title>Polygon: Added Category:BB(3,3)</title>
		<link rel="alternate" type="text/html" href="https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=3929&amp;oldid=prev"/>
		<updated>2025-09-27T16:20:15Z</updated>

		<summary type="html">&lt;p&gt;Added Category:BB(3,3)&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 16:20, 27 September 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l64&quot;&gt;Line 64:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 64:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==References==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==References==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;references/&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;references/&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Cryptids]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Category:BB(3,3)]]&lt;/ins&gt;[[Category:Cryptids]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key mediawiki:diff:1.41:old-2578:rev-3929:php=table --&gt;
&lt;/table&gt;</summary>
		<author><name>Polygon</name></author>
	</entry>
	<entry>
		<id>https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=2578&amp;oldid=prev</id>
		<title>Sligocki at 14:45, 24 July 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=2578&amp;oldid=prev"/>
		<updated>2025-07-24T14:45:20Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 14:45, 24 July 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{machine&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;|1RB2RA1LC_2LC1RB2RB_---2LA1LA}}{{TM&lt;/del&gt;|1RB2RA1LC_2LC1RB2RB_---2LA1LA}}{{unsolved|Does Bigfoot run forever?}}&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{machine|1RB2RA1LC_2LC1RB2RB_---2LA1LA}}{{unsolved|Does Bigfoot run forever?}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;&#039;Bigfoot&#039;&#039;&#039; is a [[BB(3,3)]] [[Cryptids|Cryptid]]. Its low-level behaviour was first shared [https://discord.com/channels/960643023006490684/1084047886494470185/1163168233445130270 over Discord] by savask on 14 Oct 2023, and within two days, Shawn Ligocki described the high-level rules shown below, whose attributes inspired the [[Turing machine|Turing machine&#039;s]] name.&amp;lt;ref name=&quot;b&quot;&amp;gt;S. Ligocki, &quot;[https://www.sligocki.com/2023/10/16/bb-3-3-is-hard.html BB(3, 3) is Hard (Bigfoot)] (2024). Accessed 22 July 2024.&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;&#039;Bigfoot&#039;&#039;&#039; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;({{TM|1RB2RA1LC_2LC1RB2RB_---2LA1LA}}) &lt;/ins&gt;is a [[BB(3,3)]] [[Cryptids|Cryptid]]. Its low-level behaviour was first shared [https://discord.com/channels/960643023006490684/1084047886494470185/1163168233445130270 over Discord] by savask on 14 Oct 2023, and within two days, Shawn Ligocki described the high-level rules shown below, whose attributes inspired the [[Turing machine|Turing machine&#039;s]] name.&amp;lt;ref name=&quot;b&quot;&amp;gt;S. Ligocki, &quot;[https://www.sligocki.com/2023/10/16/bb-3-3-is-hard.html BB(3, 3) is Hard (Bigfoot)] (2024). Accessed 22 July 2024.&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;div style=&amp;quot;width: fit-content; text-align: center; margin-left: auto; margin-right: auto;&amp;quot;&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;div style=&amp;quot;width: fit-content; text-align: center; margin-left: auto; margin-right: auto;&amp;quot;&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{|class=&amp;quot;wikitable&amp;quot; style=&amp;quot;margin-left: auto; margin-right: auto;&amp;quot;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{|class=&amp;quot;wikitable&amp;quot; style=&amp;quot;margin-left: auto; margin-right: auto;&amp;quot;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key mediawiki:diff:1.41:old-2577:rev-2578:php=table --&gt;
&lt;/table&gt;</summary>
		<author><name>Sligocki</name></author>
	</entry>
	<entry>
		<id>https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=2577&amp;oldid=prev</id>
		<title>Sligocki at 14:44, 24 July 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=2577&amp;oldid=prev"/>
		<updated>2025-07-24T14:44:17Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 14:44, 24 July 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l22&quot;&gt;Line 22:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 22:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The transition table of Bigfoot.&amp;lt;/div&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The transition table of Bigfoot.&amp;lt;/div&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Bigfoot was also &lt;/del&gt;[https://github.com/sligocki/sligocki.github.io/issues/8#issuecomment-2140887228 &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;successfully &lt;/del&gt;compiled] &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;to &lt;/del&gt;a 7-state 2-symbol machine &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;by Iijil: &lt;/del&gt;{{TM|0RB1RB_1LC0RA_1RE1LF_1LF1RE_0RD1RD_1LG0LG_---1LB}} &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;in May of 2024&lt;/del&gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;In May of 2024, Iijil &lt;/ins&gt;[https://github.com/sligocki/sligocki.github.io/issues/8#issuecomment-2140887228 compiled] &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Bigfoot into &lt;/ins&gt;a 7-state 2-symbol machine {{TM|0RB1RB_1LC0RA_1RE1LF_1LF1RE_0RD1RD_1LG0LG_---1LB}}.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Analysis ==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Analysis ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key mediawiki:diff:1.41:old-2062:rev-2577:php=table --&gt;
&lt;/table&gt;</summary>
		<author><name>Sligocki</name></author>
	</entry>
	<entry>
		<id>https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=2062&amp;oldid=prev</id>
		<title>ISquillante: /* Analysis */</title>
		<link rel="alternate" type="text/html" href="https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=2062&amp;oldid=prev"/>
		<updated>2025-05-30T16:22:38Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Analysis&lt;/span&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 16:22, 30 May 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l53&quot;&gt;Line 53:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 53:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;/div&amp;gt;&amp;lt;/div&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;/div&amp;gt;&amp;lt;/div&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Using the floor function, it is possible to describe the behaviour of &amp;lt;math&amp;gt;b&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; using a function that is not defined piecewise:&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Using the floor function, it is possible to describe the behaviour of &amp;lt;math&amp;gt;b&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; using a function that is not defined piecewise:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math display=&quot;block&quot;&amp;gt;\textstyle\begin{array}{c}f(m,n)=\Big(\frac{4m-3-4(\delta_1(m)-\delta_2(m)+\delta_4(m))-2(3\delta_3(m)+\delta_5(m))}{3}+n,2+\delta_1(m)+3\delta_3(m)+\delta_5(m)\Big),\\\delta_i(m)=\Big\lfloor\frac{&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;x&lt;/del&gt;-i}{6}\Big\rfloor-\Big\lfloor\frac{&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;x&lt;/del&gt;-i-1}{6}\Big\rfloor=\begin{cases}1&amp;amp;\text{if }&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;x&lt;/del&gt;\equiv i\pmod{6},\\0&amp;amp;\text{otherwise.}\end{cases}\end{array}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math display=&quot;block&quot;&amp;gt;\textstyle\begin{array}{c}f(m,n)=\Big(\frac{4m-3-4(\delta_1(m)-\delta_2(m)+\delta_4(m))-2(3\delta_3(m)+\delta_5(m))}{3}+n,2+\delta_1(m)+3\delta_3(m)+\delta_5(m)\Big),\\\delta_i(m)=\Big\lfloor\frac{&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;m&lt;/ins&gt;-i}{6}\Big\rfloor-\Big\lfloor\frac{&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;m&lt;/ins&gt;-i-1}{6}\Big\rfloor=\begin{cases}1&amp;amp;\text{if }&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;m&lt;/ins&gt;\equiv i\pmod{6},\\0&amp;amp;\text{otherwise.}\end{cases}\end{array}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;In effect, the halting problem for Bigfoot is about whether through enough iterations of &amp;lt;math&amp;gt;f(m,n)&amp;lt;/math&amp;gt; we encounter more &amp;lt;math&amp;gt;m&amp;lt;/math&amp;gt; values that are congruent to 2 modulo 6 than ones that are congruent to 1 or 4 modulo 6.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;In effect, the halting problem for Bigfoot is about whether through enough iterations of &amp;lt;math&amp;gt;f(m,n)&amp;lt;/math&amp;gt; we encounter more &amp;lt;math&amp;gt;m&amp;lt;/math&amp;gt; values that are congruent to 2 modulo 6 than ones that are congruent to 1 or 4 modulo 6.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;An important insight is that if &amp;lt;math&amp;gt;b&amp;lt;/math&amp;gt; is odd and &amp;lt;math&amp;gt;c=2&amp;lt;/math&amp;gt;, then after four iterations of &amp;lt;math&amp;gt;A&amp;lt;/math&amp;gt;, that will remain the case. This allows one to define a configuration that eliminates the &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; parameter and whose rules use a modulus of 81.&amp;lt;ref name=&amp;quot;b&amp;quot;&amp;gt;&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;An important insight is that if &amp;lt;math&amp;gt;b&amp;lt;/math&amp;gt; is odd and &amp;lt;math&amp;gt;c=2&amp;lt;/math&amp;gt;, then after four iterations of &amp;lt;math&amp;gt;A&amp;lt;/math&amp;gt;, that will remain the case. This allows one to define a configuration that eliminates the &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; parameter and whose rules use a modulus of 81.&amp;lt;ref name=&amp;quot;b&amp;quot;&amp;gt;&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Trajectory ==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Trajectory ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;After 69 steps, Bigfoot will reach the configuration &amp;lt;math&amp;gt;A(2,1,2)&amp;lt;/math&amp;gt; before the [[Collatz-like]] rules are repeatedly applied. Simulations of Bigfoot have shown that after 24000000 rule steps, we have &amp;lt;math&amp;gt;a=3999888&amp;lt;/math&amp;gt;. Here are the first few:&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;After 69 steps, Bigfoot will reach the configuration &amp;lt;math&amp;gt;A(2,1,2)&amp;lt;/math&amp;gt; before the [[Collatz-like]] rules are repeatedly applied. Simulations of Bigfoot have shown that after 24000000 rule steps, we have &amp;lt;math&amp;gt;a=3999888&amp;lt;/math&amp;gt;. Here are the first few:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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&lt;/table&gt;</summary>
		<author><name>ISquillante</name></author>
	</entry>
	<entry>
		<id>https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=1916&amp;oldid=prev</id>
		<title>MrSolis: ...</title>
		<link rel="alternate" type="text/html" href="https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=1916&amp;oldid=prev"/>
		<updated>2025-05-16T19:51:16Z</updated>

		<summary type="html">&lt;p&gt;...&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 19:51, 16 May 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l57&quot;&gt;Line 57:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 57:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;An important insight is that if &amp;lt;math&amp;gt;b&amp;lt;/math&amp;gt; is odd and &amp;lt;math&amp;gt;c=2&amp;lt;/math&amp;gt;, then after four iterations of &amp;lt;math&amp;gt;A&amp;lt;/math&amp;gt;, that will remain the case. This allows one to define a configuration that eliminates the &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; parameter and whose rules use a modulus of 81.&amp;lt;ref name=&amp;quot;b&amp;quot;&amp;gt;&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;An important insight is that if &amp;lt;math&amp;gt;b&amp;lt;/math&amp;gt; is odd and &amp;lt;math&amp;gt;c=2&amp;lt;/math&amp;gt;, then after four iterations of &amp;lt;math&amp;gt;A&amp;lt;/math&amp;gt;, that will remain the case. This allows one to define a configuration that eliminates the &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; parameter and whose rules use a modulus of 81.&amp;lt;ref name=&amp;quot;b&amp;quot;&amp;gt;&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;In May 2024, Iijil shared a 7-state, 2-symbol machine, {{TM|0RB1RB_1LC0RA_1RE1LF_1LF1RE_0RD1RD_1LG0LG_---1LB}}, that has the same behaviour as Bigfoot.&amp;lt;ref&amp;gt;P. Michel, &quot;[https://bbchallenge.org/~pascal.michel/ha.html Historical survey of Busy Beavers]&quot;.&amp;lt;/ref&amp;gt;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Trajectory ==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Trajectory ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;After 69 steps, Bigfoot will reach the configuration &amp;lt;math&amp;gt;A(2,1,2)&amp;lt;/math&amp;gt; before the [[Collatz-like]] rules are repeatedly applied. Simulations of Bigfoot have shown that after 24000000 rule steps, we have &amp;lt;math&amp;gt;a=3999888&amp;lt;/math&amp;gt;. Here are the first few:&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;After 69 steps, Bigfoot will reach the configuration &amp;lt;math&amp;gt;A(2,1,2)&amp;lt;/math&amp;gt; before the [[Collatz-like]] rules are repeatedly applied. Simulations of Bigfoot have shown that after 24000000 rule steps, we have &amp;lt;math&amp;gt;a=3999888&amp;lt;/math&amp;gt;. Here are the first few:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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&lt;/table&gt;</summary>
		<author><name>MrSolis</name></author>
	</entry>
	<entry>
		<id>https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=1915&amp;oldid=prev</id>
		<title>Cosmo at 19:45, 16 May 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=1915&amp;oldid=prev"/>
		<updated>2025-05-16T19:45:38Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 19:45, 16 May 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l21&quot;&gt;Line 21:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 21:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|}&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;|}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The transition table of Bigfoot.&amp;lt;/div&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The transition table of Bigfoot.&amp;lt;/div&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Bigfoot was also [https://github.com/sligocki/sligocki.github.io/issues/8#issuecomment-2140887228 successfully compiled] to a 7-state 2-symbol machine by Iijil: {{TM|0RB1RB_1LC0RA_1RE1LF_1LF1RE_0RD1RD_1LG0LG_---1LB}} in May of 2024.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Analysis ==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Analysis ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Let &amp;lt;math&amp;gt;A(a,b,c):=0^\infty\;12^a\;1^{2b}\;\textrm{&amp;lt;A}\;1^{2c}\;0^\infty&amp;lt;/math&amp;gt;. Then,&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Let &amp;lt;math&amp;gt;A(a,b,c):=0^\infty\;12^a\;1^{2b}\;\textrm{&amp;lt;A}\;1^{2c}\;0^\infty&amp;lt;/math&amp;gt;. Then,&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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&lt;/table&gt;</summary>
		<author><name>Cosmo</name></author>
	</entry>
	<entry>
		<id>https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=1801&amp;oldid=prev</id>
		<title>MrSolis at 11:10, 14 April 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=1801&amp;oldid=prev"/>
		<updated>2025-04-14T11:10:54Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 11:10, 14 April 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l59&quot;&gt;Line 59:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 59:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;After 69 steps, Bigfoot will reach the configuration &amp;lt;math&amp;gt;A(2,1,2)&amp;lt;/math&amp;gt; before the [[Collatz-like]] rules are repeatedly applied. Simulations of Bigfoot have shown that after 24000000 rule steps, we have &amp;lt;math&amp;gt;a=3999888&amp;lt;/math&amp;gt;. Here are the first few:&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;After 69 steps, Bigfoot will reach the configuration &amp;lt;math&amp;gt;A(2,1,2)&amp;lt;/math&amp;gt; before the [[Collatz-like]] rules are repeatedly applied. Simulations of Bigfoot have shown that after 24000000 rule steps, we have &amp;lt;math&amp;gt;a=3999888&amp;lt;/math&amp;gt;. Here are the first few:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\begin{array}{|l|}\hline A(2,1,2)\xrightarrow{49}A(3,1,3)\xrightarrow{59}A(4,2,3)\xrightarrow{109}A(3,6,2)\xrightarrow{221}A(3,9,2)\xrightarrow{379}A(3,11,5)\xrightarrow{597}A(3,18,3)\rightarrow\cdots\\\hline\end{array}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\begin{array}{|l|}\hline A(2,1,2)\xrightarrow{49}A(3,1,3)\xrightarrow{59}A(4,2,3)\xrightarrow{109}A(3,6,2)\xrightarrow{221}A(3,9,2)\xrightarrow{379}A(3,11,5)\xrightarrow{597}A(3,18,3)\rightarrow\cdots\\\hline\end{array}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;There exists a heuristic argument for Bigfoot being [[probviously]] &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;nonhalting&lt;/del&gt;. By only considering the rules for which &amp;lt;math&amp;gt;a&amp;lt;/math&amp;gt; changes, one may notice that the trajectory of &amp;lt;math&amp;gt;a&amp;lt;/math&amp;gt; values can be approximated by a random walk in which at each step, the walker moves +1 with probability &amp;lt;math display=&quot;inline&quot;&amp;gt;\frac{2}{3}&amp;lt;/math&amp;gt; or moves -1 with probability &amp;lt;math display=&quot;inline&quot;&amp;gt;\frac{1}{3}&amp;lt;/math&amp;gt;, starting at position 2. If &amp;lt;math&amp;gt;P(n)&amp;lt;/math&amp;gt; is the probability that the walker will reach position -1 from position &amp;lt;math&amp;gt;n&amp;lt;/math&amp;gt;, then &amp;lt;math display=&quot;inline&quot;&amp;gt;P(n)=\frac{1}{3}P(n-1)+\frac{2}{3}P(n+1)&amp;lt;/math&amp;gt;. Solutions to this recurrence relation come in the form &amp;lt;math display=&quot;inline&quot;&amp;gt; P(n)=c_02^{-n}+c_1&amp;lt;/math&amp;gt;, which after applying the appropriate boundary conditions reduces to &amp;lt;math display=&quot;inline&quot;&amp;gt;P(n)=2^{-(n+1)}&amp;lt;/math&amp;gt;. As a result, if the walker gets to position 3999888, then the probability of it ever reaching position -1 would be &amp;lt;math display=&quot;inline&quot;&amp;gt;2^{-3999889}\approx 2.697\times 10^{-1204087}&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;There exists a heuristic argument for Bigfoot being [[probviously]] &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;non-halting&lt;/ins&gt;. By only considering the rules for which &amp;lt;math&amp;gt;a&amp;lt;/math&amp;gt; changes, one may notice that the trajectory of &amp;lt;math&amp;gt;a&amp;lt;/math&amp;gt; values can be approximated by a random walk in which at each step, the walker moves +1 with probability &amp;lt;math display=&quot;inline&quot;&amp;gt;\frac{2}{3}&amp;lt;/math&amp;gt; or moves -1 with probability &amp;lt;math display=&quot;inline&quot;&amp;gt;\frac{1}{3}&amp;lt;/math&amp;gt;, starting at position 2. If &amp;lt;math&amp;gt;P(n)&amp;lt;/math&amp;gt; is the probability that the walker will reach position -1 from position &amp;lt;math&amp;gt;n&amp;lt;/math&amp;gt;, then &amp;lt;math display=&quot;inline&quot;&amp;gt;P(n)=\frac{1}{3}P(n-1)+\frac{2}{3}P(n+1)&amp;lt;/math&amp;gt;. Solutions to this recurrence relation come in the form &amp;lt;math display=&quot;inline&quot;&amp;gt; P(n)=c_02^{-n}+c_1&amp;lt;/math&amp;gt;, which after applying the appropriate boundary conditions reduces to &amp;lt;math display=&quot;inline&quot;&amp;gt;P(n)=2^{-(n+1)}&amp;lt;/math&amp;gt;. As a result, if the walker gets to position 3999888, then the probability of it ever reaching position -1 would be &amp;lt;math display=&quot;inline&quot;&amp;gt;2^{-3999889}\approx 2.697\times 10^{-1204087}&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==References==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==References==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;references/&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;references/&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Cryptids]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Cryptids]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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		<author><name>MrSolis</name></author>
	</entry>
	<entry>
		<id>https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=1799&amp;oldid=prev</id>
		<title>MrSolis at 11:07, 14 April 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki.bbchallenge.org/w/index.php?title=Bigfoot&amp;diff=1799&amp;oldid=prev"/>
		<updated>2025-04-14T11:07:35Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 11:07, 14 April 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l49&quot;&gt;Line 49:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 49:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Substituting &amp;lt;math&amp;gt;b\leftarrow6b+k&amp;lt;/math&amp;gt; where &amp;lt;math&amp;gt;k&amp;lt;/math&amp;gt; is the remainder for each case yields the final result.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Substituting &amp;lt;math&amp;gt;b\leftarrow6b+k&amp;lt;/math&amp;gt; where &amp;lt;math&amp;gt;k&amp;lt;/math&amp;gt; is the remainder for each case yields the final result.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;/div&amp;gt;&amp;lt;/div&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;/div&amp;gt;&amp;lt;/div&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Using the floor function, it is possible to describe the behaviour of &amp;lt;math&amp;gt;b&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;as one united formula&lt;/del&gt;:&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Using the floor function, it is possible to describe the behaviour of &amp;lt;math&amp;gt;b&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;using a function that is not defined piecewise&lt;/ins&gt;:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\textstyle\begin{array}{c}f(m,n)=\Big(\frac{4m-3-4(\delta_1(m)-\delta_2(m)+\delta_4(m))-2(3\delta_3(m)+\delta_5(m))}{3}+n,2+\delta_1(m)+3\delta_3(m)+\delta_5(m)\Big),\\\delta_i(m)=\Big\lfloor\frac{x-i}{6}\Big\rfloor-\Big\lfloor\frac{x-i-1}{6}\Big\rfloor=\begin{cases}1&amp;amp;\text{if }x\equiv i\pmod{6},\\0&amp;amp;\text{otherwise.}\end{cases}\end{array}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\textstyle\begin{array}{c}f(m,n)=\Big(\frac{4m-3-4(\delta_1(m)-\delta_2(m)+\delta_4(m))-2(3\delta_3(m)+\delta_5(m))}{3}+n,2+\delta_1(m)+3\delta_3(m)+\delta_5(m)\Big),\\\delta_i(m)=\Big\lfloor\frac{x-i}{6}\Big\rfloor-\Big\lfloor\frac{x-i-1}{6}\Big\rfloor=\begin{cases}1&amp;amp;\text{if }x\equiv i\pmod{6},\\0&amp;amp;\text{otherwise.}\end{cases}\end{array}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;In effect, the halting problem for Bigfoot is about whether through enough iterations of &amp;lt;math&amp;gt;f(m,n)&amp;lt;/math&amp;gt; we encounter more &amp;lt;math&amp;gt;m&amp;lt;/math&amp;gt; values that are congruent to 2 modulo 6 than ones that are congruent to 1 or 4 modulo 6.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;In effect, the halting problem for Bigfoot is about whether through enough iterations of &amp;lt;math&amp;gt;f(m,n)&amp;lt;/math&amp;gt; we encounter more &amp;lt;math&amp;gt;m&amp;lt;/math&amp;gt; values that are congruent to 2 modulo 6 than ones that are congruent to 1 or 4 modulo 6.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l59&quot;&gt;Line 59:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 59:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;After 69 steps, Bigfoot will reach the configuration &amp;lt;math&amp;gt;A(2,1,2)&amp;lt;/math&amp;gt; before the [[Collatz-like]] rules are repeatedly applied. Simulations of Bigfoot have shown that after 24000000 rule steps, we have &amp;lt;math&amp;gt;a=3999888&amp;lt;/math&amp;gt;. Here are the first few:&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;After 69 steps, Bigfoot will reach the configuration &amp;lt;math&amp;gt;A(2,1,2)&amp;lt;/math&amp;gt; before the [[Collatz-like]] rules are repeatedly applied. Simulations of Bigfoot have shown that after 24000000 rule steps, we have &amp;lt;math&amp;gt;a=3999888&amp;lt;/math&amp;gt;. Here are the first few:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\begin{array}{|l|}\hline A(2,1,2)\xrightarrow{49}A(3,1,3)\xrightarrow{59}A(4,2,3)\xrightarrow{109}A(3,6,2)\xrightarrow{221}A(3,9,2)\xrightarrow{379}A(3,11,5)\xrightarrow{597}A(3,18,3)\rightarrow\cdots\\\hline\end{array}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;math display=&amp;quot;block&amp;quot;&amp;gt;\begin{array}{|l|}\hline A(2,1,2)\xrightarrow{49}A(3,1,3)\xrightarrow{59}A(4,2,3)\xrightarrow{109}A(3,6,2)\xrightarrow{221}A(3,9,2)\xrightarrow{379}A(3,11,5)\xrightarrow{597}A(3,18,3)\rightarrow\cdots\\\hline\end{array}&amp;lt;/math&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;There exists a heuristic argument for Bigfoot being [[probviously]] nonhalting. &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;After removing &lt;/del&gt;the &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;instances in &lt;/del&gt;which &amp;lt;math&amp;gt;a&amp;lt;/math&amp;gt; &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;does not change&lt;/del&gt;, one &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;notices &lt;/del&gt;that the trajectory of &amp;lt;math&amp;gt;a&amp;lt;/math&amp;gt; values can be approximated by a random walk in which at each step, the walker moves +1 with probability &amp;lt;math display=&quot;inline&quot;&amp;gt;\frac{2}{3}&amp;lt;/math&amp;gt; or moves -1 with probability &amp;lt;math display=&quot;inline&quot;&amp;gt;\frac{1}{3}&amp;lt;/math&amp;gt;, starting at position 2. If &amp;lt;math&amp;gt;P(n)&amp;lt;/math&amp;gt; is the probability that the walker will reach position -1 from position &amp;lt;math&amp;gt;n&amp;lt;/math&amp;gt;, then &amp;lt;math display=&quot;inline&quot;&amp;gt;P(n)=\frac{1}{3}P(n-1)+\frac{2}{3}P(n+1)&amp;lt;/math&amp;gt;. Solutions to this recurrence relation come in the form &amp;lt;math display=&quot;inline&quot;&amp;gt; P(n)=c_02^{-n}+c_1&amp;lt;/math&amp;gt;, which after applying the appropriate boundary conditions reduces to &amp;lt;math display=&quot;inline&quot;&amp;gt;P(n)=2^{-(n+1)}&amp;lt;/math&amp;gt;. As a result, if the walker gets to position 3999888, then the probability of it ever reaching position -1 would be &amp;lt;math display=&quot;inline&quot;&amp;gt;2^{-3999889}\approx 2.697\times 10^{-1204087}&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;There exists a heuristic argument for Bigfoot being [[probviously]] nonhalting. &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;By only considering &lt;/ins&gt;the &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;rules for &lt;/ins&gt;which &amp;lt;math&amp;gt;a&amp;lt;/math&amp;gt; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;changes&lt;/ins&gt;, one &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;may notice &lt;/ins&gt;that the trajectory of &amp;lt;math&amp;gt;a&amp;lt;/math&amp;gt; values can be approximated by a random walk in which at each step, the walker moves +1 with probability &amp;lt;math display=&quot;inline&quot;&amp;gt;\frac{2}{3}&amp;lt;/math&amp;gt; or moves -1 with probability &amp;lt;math display=&quot;inline&quot;&amp;gt;\frac{1}{3}&amp;lt;/math&amp;gt;, starting at position 2. If &amp;lt;math&amp;gt;P(n)&amp;lt;/math&amp;gt; is the probability that the walker will reach position -1 from position &amp;lt;math&amp;gt;n&amp;lt;/math&amp;gt;, then &amp;lt;math display=&quot;inline&quot;&amp;gt;P(n)=\frac{1}{3}P(n-1)+\frac{2}{3}P(n+1)&amp;lt;/math&amp;gt;. Solutions to this recurrence relation come in the form &amp;lt;math display=&quot;inline&quot;&amp;gt; P(n)=c_02^{-n}+c_1&amp;lt;/math&amp;gt;, which after applying the appropriate boundary conditions reduces to &amp;lt;math display=&quot;inline&quot;&amp;gt;P(n)=2^{-(n+1)}&amp;lt;/math&amp;gt;. As a result, if the walker gets to position 3999888, then the probability of it ever reaching position -1 would be &amp;lt;math display=&quot;inline&quot;&amp;gt;2^{-3999889}\approx 2.697\times 10^{-1204087}&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==References==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==References==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;references/&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;references/&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Cryptids]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Cryptids]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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		<author><name>MrSolis</name></author>
	</entry>
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