View source for BB(4,4)

The 4-state 4-symbol [[Busy Beaver]] problem, BB(4,4), is unsolved and unexplored. With [[Cryptids]] like [[Bigfoot]] in the preceding domain [[BB(3,3)]], we know that we must solve a [[Collatz-like]] problem in order to solve BB(4,4). The current BB(4,4) [[champion]] is simply inherited from [[BB(3,4)]] as BB(4,4) has not been explored yet.

In September 2025, [[User:Tjligocki|tjligocki]] ran a test enumeration on one of 1 billion subtasks. The subtask ran for 1.5 hours and produced ~9000 [[holdouts]]. When corrected for the amount of subtasks involved, these values are 9000 times longer and 3500 times larger than the ones for [[BB(2,7)]].<ref>https://discord.com/channels/960643023006490684/1084047886494470185/1421553188322021528</ref>

== References ==

[[Category:BB Domains]]