View source for 1RB0LD 1RC0RF 1LC1LA 0LE1RZ 1LF0RB 0RC0RE

{{machine|1RB0LD_1RC0RF_1LC1LA_0LE1RZ_1LF0RB_0RC0RE}}
{{TM|1RB0LD_1RC0RF_1LC1LA_0LE1RZ_1LF0RB_0RC0RE|halt}}

Former [[BB(6)]] Champion. Discovered by Pavel Kropitz on 30 May 2022. This TM runs for over 10↑↑15 steps. See analysis: <ref>S. Ligocki, "[https://www.sligocki.com/2022/06/21/bb-6-2-t15.html BB(6, 2) > 10↑↑15]". Blog post, 2022. Accessed 20 June 2024.</ref>.

It simulates the following Collatz-like rules, starting at <math>C(5)</math>, on tape configurations <math>C(n) = 0^\infty\; 1\; 0^n\; 11\; 0^5\; \textrm{C>}\; 0^\infty</math>:

<math display="block">\begin{array}{l}
  C(4k)   & \to & Halt(\frac{3^{k+3} - 11}{2}) \\
  C(4k+1) & \to & C(\frac{3^{k+3} - 11}{2}) \\
  C(4k+2) & \to & C(\frac{3^{k+3} - 11}{2}) \\
  C(4k+3) & \to & C(\frac{3^{k+3} + 1}{2}) \\
\end{array}</math>

==References==
<references />

[[Category:Stub]]