Links to other sites

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This is a list of other sites, related to googology. Basically, it is similar to links page.

Sites for beginners

Googology Wiki (a collection of notations and numbers which must have valid sources + more approximations), most likely moved soon
Sbiis Saibian's excellent Large Numbers site (a guided tour about number systems. There, he made a system, named Extensible-E, recommended for beginners)
MROB's large number site by Robert Munafo
Polytope sites by Jonathan Bowers (including -illions, BEAF and infinity scrapers via Big Number Central)

Large Numbers Gradually Increasing by Douglas Shamlin Jr. (a series/playlist about numbers increasing, but only shown in Bird's array notation)
Numbers -Infinity to Infinity by NO! (a playlist about numbers increasing, it's fun to watch, hence recommended for beginners)
1 to Absolute Infinity in One Video by NO! (a journey of numbers from 1 to Absolute Infinity. NOTE: the video is 14 hours long, combined from Large Numbers Gradually Increasing)
Ultimate List of Large Numbers videos (originally by Douglas Shamlin Jr., but reuploaded by Dr2xmillion 2023 because the original videos were removed)
Hexation and Graham's Number by Prime Newtons (discussing hyperoperation and Graham's number)

Prime number pages:

- Prime Pages (formerly by Samuel Yates and Chris Caldwell, now maintained by Reginald McLean) (site moved)
  - 5000 Largest Primes (a site which offers primes that are large enough for top 5000)
  - Top 20's Home Page (a site which offers top 20 primes of the selected categories)
PrimeGrid (a distributed computing project that finds primes)
Top 10000 PRP site by Henri Lifchitz