https://wiki.bbchallenge.org/w/index.php?action=history&feed=atom&title=BB%282%2C9%29 2026-05-02T11:15:05Z Revision history for this page on the wiki MediaWiki 1.43.5 https://wiki.bbchallenge.org/w/index.php?title=BB(2,9)&diff=6312&oldid=prev 2026-02-20T14:19:39Z

<p>Made this page consistent with other BB Domain pages</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 14:19, 20 February 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="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;"><div><del style="font-weight: bold; text-decoration: none;">Il problema di bb</del>(2,9) (2 <del style="font-weight: bold; text-decoration: none;">stati e 9 simboli</del>) <del style="font-weight: bold; text-decoration: none;">e inesplorato da tutti</del>, <del style="font-weight: bold; text-decoration: none;">cio implica che bb</del>(2,9) <del style="font-weight: bold; text-decoration: none;">e difficilissimo</del>, <del style="font-weight: bold; text-decoration: none;">ho ipotizzato che bb</del>(2,9)<del style="font-weight: bold; text-decoration: none;">≥bb</del>(7)</div></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">The 2-state 9-symbol [[Busy Beaver]] problem, BB</ins>(2,9)<ins style="font-weight: bold; text-decoration: none;">, is unsolved and unexplored. With [[Cryptids]] like [[Hydra]] in the preceding domain [[BB</ins>(2<ins style="font-weight: bold; text-decoration: none;">,5</ins>)<ins style="font-weight: bold; text-decoration: none;">]]</ins>, <ins style="font-weight: bold; text-decoration: none;">we know that we must solve a [[Collatz-like]] problem in order to solve BB</ins>(2,9)<ins style="font-weight: bold; text-decoration: none;">. The current BB(2</ins>,<ins style="font-weight: bold; text-decoration: none;">9) [[champion]] is simply inherited from [[BB(2,6)]] as BB</ins>(2,9) <ins style="font-weight: bold; text-decoration: none;">has not yet been explored.</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div> </div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">It is known from the enumeration of [[BB</ins>(<ins style="font-weight: bold; text-decoration: none;">2,</ins>7)<ins style="font-weight: bold; text-decoration: none;">]] that BB(2,9) will be very hard to enumerate.</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div> </div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:BB Domains]]</ins></div></td></tr> <!-- diff cache key mediawiki:diff:1.41:old-6210:rev-6312:php=table --> </table>

Polygon https://wiki.bbchallenge.org/w/index.php?title=BB(2,9)&diff=6210&oldid=prev 2026-02-12T13:36:26Z

<p>Created page with &quot;Il problema di bb(2,9) (2 stati e 9 simboli) e inesplorato da tutti, cio implica che bb(2,9) e difficilissimo, ho ipotizzato che bb(2,9)≥bb(7)&quot;</p> <p><b>New page</b></p><div>Il problema di bb(2,9) (2 stati e 9 simboli) e inesplorato da tutti, cio implica che bb(2,9) e difficilissimo, ho ipotizzato che bb(2,9)≥bb(7)</div>

BB fan weird