Source: /cirosantilli/marxen-buntrock-machine

= Marxen-Buntrock machine
{title2=1989}
{title2=4098 1's}
{title2=~47M steps}

Best <busy beaver> machine known since 1989 as of 2023, before a full proof of all 5 state machines had been carried out.

Entry on <The Busy Beaver Challenge>: https://bbchallenge.org/1RB1LC_1RC1RB_1RD0LE_1LA1LD_1RZ0LA

Paper extracted to HTML by Heiner Marxen: http://turbotm.de/~heiner/BB/mabu90.html