User blog comment:Mango523WNR/I Have A question/@comment-31966679-20190816011104

g(64)^^^g(64) is not even g(65), so that is the least. TREE(3) is greater than g(g(g(g(...(1000000)...))) by far, so TREE(4) would be far, far bigger.

It goes g(64)^^^g(64), g(128), then TREE(4)