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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 35,213 articles since December 5, 2008. If you're fascinated by numbers like emperal or BIGG, why not help us out? We encourage you to edit! As of December 5, 2024, Googology Wiki is now 16 years old and going strong!

(Googology in other languages: Česky · Deutsch · Español · Français · 日本語 · Nederlands · Русский · 한국어 · 中文 · Українська

New to big numbers?

Googology is the mathematical study of large numbers and fast-growing functions, as well as their properties and 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 and functions

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!

Quote

Two stones produce two houses; three form six; four form twenty-four; five form one hundred and twenty; six form seven hundred and twenty; seven form five thousand and forty; and beyond this their numbers increase so that the mouth can hardly utter them, nor the ear hear the number of them.

—Sefer Yetzirah^[src]

Contributing

Got an idea or a creation to share? Create an account on Fandom if you haven't already, wait for being autoconfirmed and create a blog post.

Please read carefully FANDOM's terms of use and the policy before creating or editing an article. See community portal for more information.

GoogolNews™

July 11, 2025: We celebrated yet another major milestone amid the slowdown of the article creation blowout. We made the 35,000th article! This is not quite as big as the 25,000th article milestone.
May 28, 2025: Following the steep slowdown of the article creation, we finally reached the 34,000th article!
April 1, 2025: Happy April Fool's Day!
March 11, 2025: We made the 33,333rd article, that's (almost) a third to a lakh! The article creation blowout has been completely stalled.
March 8, 2025: A 33,000th article was finally made, 2 weeks after the previous milestone!
February 22, 2025: We made the 32,000th article!
February 20, 2025: We made the 31,416th article, that's \(\lceil \pi\times 10000\rceil\)!
February 16, 2025: 6 days after the last milestone, we've hit the 31,000th article!
February 10, 2025: We celebrated a major milestone with the 30,000th article, 2 days after the previous milestone!!!
February 8, 2025: A 29,000th article was made!
February 2, 2025: In the midst of the article creation blowout, a 28,000th article was made!
January 28, 2025: We managed to get to the 27,000th article! The article creation blowout territory continues…
January 22, 2025: Malay Googology Wiki https://googologi.fandom.com/ms/wiki/Wikia_Googologi has been launched on Fandom.
January 21, 2025: We managed to reach the 26,000th article!
January 14, 2025: Here's a HUGE milestone! The 25,000th article, that's quarter to a lakh!
January 13, 2025: 24,000th article after just a single day from the previous milestone! We're near a big milestone!
January 12, 2025: We've hit the 23,000th article! The article creation blowout territory began!
January 10, 2025: We made into the 22,222nd article!
January 8, 2025: We reached the 22,000th article!
January 7, 2025: Fandom announced that Googology Wiki would be migrated to MediaWiki 1.43 by April.
January 1, 2025: Happy New Year, 2025!

More news...

Links

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

For beginners

What is googology? Genspark (AI) collected and summarized information on googology. Recommended for beginners to get some background information.
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.
Pointless Large Number Stuff by wiki user cookiefonster. Also recommended for beginners.

Sites

Aarex Googology by Aarex Tiaokhiao/(user (inactive))
Big Number Central by Jonathan Bowers
Notable Properties of Specific Numbers by Robert Munafo
Super Huge Numbers (main site) by Chris Bird
Big Number Duel by Agustín Rayo
Hayden's Big Numbers by wiki user HaydenTheGoogologist2009
Pointless Googolplex Stuffs and ExE ultimate googolism generator by wiki user DeepLineMadom
AR Googol by wiki user ARsygo
Who Can Name the Bigger Number? by Scott Aaronson
Turing Machine Simulator by Anthony Morphett
CompactStar's Googology by wiki user CompactStar

Impossible Numbers by wiki user Antfarmerguys

Subreddits

r/googology
r/Scholar

Ordinals

Ordinal Explorer by wiki user Rgetar
An interactive diagram for ordinals up to \(\varepsilon_{\varepsilon_0}\)

Non-wiki googology links in other languages

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.

Miscellany

Googol Maps 2.0 (year - size) by wiki user Koteitan