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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 21,010 articles since December 5, 2008. If you're fascinated by numbers like millillion or Loader's number, why not help us out? We encourage you to edit! As of December 5, 2023, Googology Wiki is now 15 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

I have this vision of hoards of shadowy numbers lurking out there in the dark, beyond the small sphere of light cast by the candle of reason. They are whispering to each other; plotting who knows what. Perhaps they don't like us very much for capturing their smaller brethren with our minds. Or perhaps they just live uniquely numberish lifestyles, out there beyond our ken.

—Douglas Reay

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™

November 29, 2024 We reached the 21,000-th article!
November 17, 2024: Polish Googology Wiki https://googologia-po-polsku.fandom.com/pl/wiki/Googologia_Po_Polsku_Wiki has been launched on fandom.
October 28, 2024: A Russian court ordered Google to pay compensation to blocked Russian state TV channels, amounting to 2 undecillion rubles.
October 21, 2024: The new largest known prime, 2^136,279,841-1 was discovered after nearly 6 years!
July 2, 2024: FF(5) or S(5) = 47,176,870 was proved.
June 7, 2024: This is a SUPER MILESTONE!!! We finally reached our 20,000th article!!!
May 5, 2024: We finally reached our 19,000-th article!
January 1, 2024: Happy New Year, 2024!
December 5, 2023: Googology Wiki turned 15 years old!
November 21, 2023: Ukrainian Googology Wiki in the name of Вікі Googology was linked to our community!
October 22, 2023: We reached our 18,000-th article! That's 90% of the way to the big 20,000!
June 29, 2023: We finally reached our 17,000-th article!
June 8, 2023: Googology Wiki underwent several technical issues related to the assets, so Fandom wikis wouldn't render properly for a brief period, including, but not limited to this wiki and Community Central. The issues were subsequently fixed in the later days. Sorry for an another mess!
May 11, 2023: We finally reached our 16,000-th article!
April 20, 2023: MediaWiki was upgraded to 1.39.
March 18, 2023: Yet another big milestone... We finally reached our 15,000th article!
February 28, 2023: Fandom announced that Googology Wiki would be migrated to MediaWiki 1.39 by April 20.
February 10, 2023: We reached the 14,000-th article!
January 14 – 20, 2023: We held the second admin election, and relieved C7X's admin and bureaucrat career!
January 12, 2023: We opened the second admin election, and is set to hold by January 14, 2023.
January 1, 2023: Happy New Year, 2023!

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.

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
Pointless Large Number Stuff by wiki user cookiefonster
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