**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 **11,350** articles since December 5, 2008. If you're fascinated by numbers like millillion or byllion, why not help us out? We encourage you to edit! As of December 5, 2021, Googology Wiki is now 13 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
- New pages · New images
- Recent changes · Logs
- Other wikis

## Article Count Progress

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

## Quote

^{[src]}

## 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™

- December 5, 2021: Googology Wiki turned 13 years old!
- November 22, 2021: Googology Wiki's URL was migrated to the standard "fandom.com" domain, as announced here. Old URL (wikia.org, and older wikia.com) is redirected to the new URL.
- November 13, 2021: Now MathJax works on mobile device.
- November 7, 2021: Definition of a large number, True EB Sequence Number, is on sale as a digital art of NFT (non-fungible token). It might be the first googologism on NFT.
- August 17, 2021: We are using MathJax v3 now. Improved speed is expected.
- August 16, 2021: The design was changed to FandomDesktop by Fandom.
- August 13, 2021: We confirm that classic google sites will not be available from 1 September 2021. It hosts googology sites by Saibian, Cookiefonster and Username5243 for example. The owners can migrate to new google sites. If you are not the owners of said sites, you can help by going to here and save a page of the site.
- 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.

## 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**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 \(\varepsilon_{\varepsilon_0}\)