1RB0LB2LA 1LA0RC0LB 2RC2RB0LC: Difference between revisions
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{{machine|1RB0LB2LA_1LA0RC0LB_2RC2RB0LC | {{machine|1RB0LB2LA_1LA0RC0LB_2RC2RB0LC}} | ||
{{TM|1RB0LB2LA_1LA0RC0LB_2RC2RB0LC}} is the current [[Beeping Busy Beaver#Champions|BBB(3,3)]] [[Champions|champion]]. It was discovered in March 2025 by Nick Drozd and runs for <math>10 \uparrow \uparrow 6</math> steps before [[Quasihalt|quasihalting]].<ref>https://groups.google.com/g/busy-beaver-discuss/c/EuIXSir4Eps</ref> | {{TM|1RB0LB2LA_1LA0RC0LB_2RC2RB0LC}} is the current [[Beeping Busy Beaver#Champions|BBB(3,3)]] [[Champions|champion]]. It was discovered in March 2025 by Nick Drozd and runs for <math>10 \uparrow \uparrow 6</math> steps before [[Quasihalt|quasihalting]].<ref>https://groups.google.com/g/busy-beaver-discuss/c/EuIXSir4Eps</ref> | ||
Revision as of 18:49, 6 February 2026
1RB0LB2LA_1LA0RC0LB_2RC2RB0LC (bbch) is the current BBB(3,3) champion. It was discovered in March 2025 by Nick Drozd and runs for steps before quasihalting.[1]
Analysis by Shawn Ligocki
D(a, d) = 0^inf <C 0^a 1 2^d 1 0^inf
D(a, d+3) --> D(2^{a+6} - 2, d)
D(a, 0) --> Spin out
D(a, 1) --> C(14, a+1)
D(a, 2) --> C(14, a+4)
Start: D(14, 2)
This is actually a Collatz-like pentation-level TM that got unlucky! Each "reset" it iterates a tetration level function:
D(14, 3k+r) --> D(> 2^^k, r)
But in this case, the TM only resets once before spinning out:
D(14, 2) --> D(14, 18) --> Spin out
See also
https://nickdrozd.github.io/2025/03/24/bbb-3-3.html