3 ms·

Or Friedman’s SSCG function.

• lisper 7y ago
  > "SSCG(3) is much, much larger than both TREE(3) and TREE^(TREE(3))(3) (the TREE function nested TREE(3) times with 3 at the bottom)" Holy freakin' cow. And the busy beaver sequence grows faster than that. My mind is well and truly boggled.