User blog comment:Mango523WNR/I Have A question/@comment-37246647-20190815092642

Graham's number pentated by Graham's number is the smallest, because the Graham sequence is such that g(n+1) is 3[g(n)]3 in hyper-operator notation, and g1 is 3^^^^3. g128 is therefore MUCH larger than g64, but they are both less than a Planck length compared to TREE(4). The TREE sequence is based on a theorem in combinatorics and can be proven to be much stronger than the Graham sequence. TREE(3), the most famous member of the TREE sequence, is unbelievably larger than g128, and TREE(4) is unbelievably larger than TREE(3).