Googology Wiki is an online encyclopedia and community dedicated to large numbers.

Welcome to the Internet's most comprehensive database of large numbers and fast-growing functions. We have made 10,954 articles since December 5, 2008. If you're fascinated by numbers like TREE[3] or SCG(13), why not help us out? We encourage you to edit! As of December 5, 2020, Googology Wiki is now 12 years old and going strong!

(Other languages: Nederlands · Deutsch · 日本語 · Français · 中文 · Русский · Česky · Español · 한국어)

New to big numbers?

Googology is the mathematical study of large numbers, their properties, and their nomenclature. If you're interested in the subject, but you don't know where to start, try reading about some basic functions and ideas:

Also, be sure to check out the links below.

Around the Wiki

Article Count Progress

We have reached 0% of our goal of 10100 articles!


Counting this way for unspeakable eons,
Using unspeakable numbers,
Counting eons by these atoms,
One atoms standing for ten myriad unspeakable numbers of eons,
If you praise a single Universally Good for that many eons,

It would still be impossible to exhaust the amount of virtue of Universal Good.
  —from the Avatamsaka Sutra


Got an idea or a creation to share? Sign up for Wikia if you haven't already, and create a blog post.

Found googology from a third-party source that isn't in the encyclopedia yet? Create a new article.


  • June 19, 2021: Polish Googology Wiki is relaunched with the name Googologia Wiki.
  • May 15 - 25, 2021: We held the first admin election.
  • March 8, 2021: We reached the 11,000-th article!
  • January 12, 2021: A change was made to the logo.
  • December 5, 2020: Googology Wiki turned 12 years old!
  • October 7, 2020: Googology Wiki has switched to UCP, and MathJax is broken again.
  • July 6, 2020: RIP, Ron Graham. See Graham's number.
  • April 11, 2020: RIP, John Conway. See Chained arrow notation.
  • December 5, 2019: Googology Wiki turned 11 years old!
  • June 8, 2019: Jonathan Bowers plans on making a video series on his arrays.
  • December 5, 2018: It's been 10 years since Googology Wiki was created. We came a long way!
  • October 30, 2018: Polish Googology Wiki is established.
  • July 19, 2018: Malay Googology Wiki is established.
  • June 14, 2018: This wiki has switched to HTTPS, however MathJax tries to load itself through HTTP, so many formulas will not render now. This has been fixed, but it'll take some time to be approved. Sorry about the mess again!
  • December 9, 2017: It is the 9th Anniversary of Sbiis Saibian's site!
  • December 5, 2017: Googology Wiki celebrates 9 years!
  • September 5, 2017: Czech Googology wiki is open.
  • January 4, 2017: We finally reached our 10,000th article!!!
  • December 5, 2016: Happy 8th birthday, Googology Wiki!

More news...


This is a compilation of websites that may be of interest to large number enthusiasts.

Community content is available under CC-BY-SA unless otherwise noted.