Really Big Numbers (2015) (mathenchant.wordpress.com)

"Already 7 inside a heptagon is much, much bigger than Graham’s number." Did I completely misunderstand that the polygon series is pretty much the Steinhaus-Moser polygons? Because Graham's Number is way out beyond what can be compactly expressed in those.

A page on large numbers is good if it eventually points to Harvey Friedman's work.

Just to add, I really enjoyed Scott Aaronson's essay on this topic: https://www.scottaaronson.com/writings/bignumbers.html

Wait But Why has an excellent piece on Graham's number: https://waitbutwhy.com/2014/11/1000000-grahams-number.html