**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:

- Short essay on the foundations and history of the field
- Googol and googolplex
- Tetration
- Arrow notation
- Graham's number
- Introduction to Googology blog post by Sbiis Saibian
- List of googolisms
- List of functions

Also, be sure to check out the links below.

## Around the Wiki

- About
- Policy
- Guidelines for mainspace pages (related)
- Googology_Wiki:Discussion
- People
- Discord
- New pages · New images
- Recent changes · Logs
- Other wikis

## Article Count Progress

We have reached **0%** of our goal of 10^{100} articles!

## Quote

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,

## Contributing

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.

## GoogolNews™

- 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!

## Links

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

**Large numbers increasing**Douglas Shamlin Jr.'s video series about increasing numbers. It goes from zero to numbers described using Bird's array notation. Recommended for beginners.**One to Infinity: A Guide to the Finite**by Sbiis Saibian/(user), a guided tour of googology and number systems. Recommended for beginners.**Large Numbers**by Robert Munafo. Recommended for beginners.**Aarex Googology**by Aarex Tiaokhiao/(user)**Big Number Central**by Jonathan Bowers**Extremely big numbers**by Lawrence Hollom**Notable Properties of Specific Numbers**by Robert Munafo**Super Huge Numbers**by Chris Bird**Pointless Large Number Stuff**by wiki user cookiefonster**My Large Numbers**by wiki user Username5243/(user)**Big Number Duel**by Agustín Rayo**Large Numbers**by wiki user Eners49**/r/googology subreddit****/r/Scholar subreddit****Who Can Name the Bigger Number?**by Scott Aaronson**Googology Discord Server****Ordinal Explorer**by wiki user Rgetar**Turing Machine Simulator**by Anthony Morphett**Googol Maps 2.0**(year - size) by wiki user Koteitan**大数入门**for those who know Chinese. Beware though, the article contains tons of mistakes.**Large Number in pixiv dictionary**for those who know Japanese.**An interactive diagram**for ordinals up to \(\varepsilon_{\varepsilon_0}\)