User blog comment:Maxywaxy/Do any functions reach this growth rate?/@comment-35870936-20181213051641/@comment-35470197-20181213062624

The busy beaver function is not the fastest one. Moreover, it is one of the slowest functions among well-known well-understood uncomputable functions. Of course, it depends on the meaning of "known" and "understood", but I could not understand why you chose the busy beaver function.