@engarneering @lowqualityfacts My only complaint about the Busy Beaver or Reyo numbers is that they are largely uncomputable. It's not that they are simply not known, but they cannot be known via any sort of algorithm. We can only know their lower bounds above a certain point.

That's why I like numbers derived from the fast-growing hierarchy. They might be unimaginably large but at least you know how to get to their true values computationally.