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- 16:35, 20 February 2026 Polygon talk contribs created page BB(4,4) (Created page with "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, tjligocki ran a test enumeration on one of 1 billion subtasks. The subtask ran for 1.5 hours...")