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Marxen-Buntrock machine (1989, 4098 1's, ~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: bbchallenge.org/1RB1LC_1RC1RB_1RD0LE_1LA1LD_1RZ0LA
Paper extracted to HTML by Heiner Marxen: turbotm.de/~heiner/BB/mabu90.html

Ancestors (13)

  1. BB(5)
  2. Specific values of the Busy beaver function
  3. Busy beaver function
  4. Busy beaver
  5. Halting problem
  6. Decision problem
  7. Computational problem
  8. Computer science
  9. Computer
  10. Information technology
  11. Area of technology
  12. Technology
  13. Home