Graham's Number

[pier4r]

Thanks for sharing.

Maybe in your post you can add also this article (that likely I saw shared here in some thread).

"Who Can Name the Bigger Number?" https://www.scottaaronson.com/writings/bignumbers.html

That's pretty informative for an overview. The same with some of Numberphile's videos (For example about the tree function https://en.wikipedia.org/wiki/Kruskal%27s_tree_theorem ). Numberphile has also some videos on graham's number.

And down we dive! (although only overviews, glorious wiki)
Serendipity or at least related ideas!
https://en.wikipedia.org/wiki/Large_numbers (check the informative box at the end)
https://en.wikipedia.org/wiki/Fast-growing_hierarchy
https://en.wikipedia.org/wiki/History_of_large_numbers
https://en.wikipedia.org/wiki/Hyperoperation