Googol has one hunderd zeroes, googolplex has one googol zeroes. So that Googol is also hunderdplex. Jiawheinalt (talk) 08:09, February 1, 2013 (UTC)

## 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

What is the longest page title in this wiki? --84.61.189.220 07:28, August 4, 2013 (UTC)

I want a maximal length of digit-only page titles. Should 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 (the full decimal expansion of octogintillion) redirect to octogintillion? --84.61.189.220 07:44, August 4, 2013 (UTC)

I don't think so. LittlePeng9 (talk) 07:59, August 4, 2013 (UTC)

Since 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 redirects to Googol, 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 should be kept. --84.61.189.220 08:05, August 4, 2013 (UTC)

Octogintillion is of no big importance, apart from being longest number expressible in page title. LittlePeng9 (talk) 08:38, August 4, 2013 (UTC)

I think that 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 should remain the largest decimal expansion, which redirects to the corresponding article. Some numbers slightly larger than googol are googolteen, gooprol, booprol, trooprol, quadrooprol, googolty, and tretrigintillion. --84.61.189.220 08:49, August 4, 2013 (UTC)

Given that the 68-digit number 48870871124826570463953805139878697155358000962012333290725030523875, which is currently the largest decimal expansion with an existing non-redirect page, doesn't fit into the layout of Special:Allpages very well, the redirects 100000000000000000000000000000000000000000000000000000000000000000000, 1000000000000000000000000000000000000000000000000000000000000000000000, 7777777777777777777777777777777777777777777777777777777777777777777777, 100000000000000000000000000000000000000000000000000000000000000000000000, 1000000000000000000000000000000000000000000000000000000000000000000000000, 100000000000000000000000000000000000000000000000000000000000000000000000000, 1000000000000000000000000000000000000000000000000000000000000000000000000000, 1000000000000000000000000000000000000000000000000000000000000000000000000000000, 88888888888888888888888888888888888888888888888888888888888888888888888888888888, 1000000000000000000000000000000000000000000000000000000000000000000000000000000000, 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000, 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, 999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999, 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, 1618033988749894848204586834365638117720309179805762862135448622705260462818902449707207204189391137, 2718281828459045235360287471352662497757247093699959574966967627724076630353547594571382178525166427, and 3141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067, all of which are decimal expansions with more than 68 digits, should be deleted. 15747724136275002577605653961181555468044717914527116709366231425076185631031296 and 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 should be kept, because 15747724136275002577605653961181555468044717914527116709366231425076185631031296 and 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 redirect to Eddington number and Googol, respectively. --84.61.176.82 18:06, December 26, 2013 (UTC)

Redirects from decimal expansions longer than 43 digits shouldn't be kept, unless the corresponding redirect does exist in the English Wikipedia. --84.61.176.82 07:43, December 27, 2013 (UTC)

man who givesa shit abuot Special:SLlpages; i think itsajust silly to have anythiang more than lika 20 digits FB100Z • talk • contribs 07:56, December 27, 2013 (UTC)

## Theory

Googol = Hundredplex

Googolplex = Hundred-duplex

Googol-n-plex = Hundred-(n+1)-plex

-- A Large Number Googologist -- 00:45, October 19, 2014 (UTC)

One Hundred = Twoplex.

D57799 (talk) 02:04, October 19, 2014 (UTC)

- The sum of digits of one hundred is 1. One hundred = 2-plex. 1+2=3. Half-Life 3 confirmed. -- ☁ I want more clouds! ⛅ 13:37, October 19, 2014 (UTC)
- wut?
- by the way:
- 100 = twoplex
- googol = twoduplex
- googolplex = twotriplex
- googol-n-plex = two-(n+2)-plex
- -- A Large Number Googologist -- 19:03, October 22, 2014 (UTC)

## History

“The term was coined by Edward Kasner's nine-year-old nephew, Milton Sirotta, some time before 1940. It was first published in a book co-written by Kasner *Mathematics and the Imagination*.” (this article)

The term was already published in *New Names in Mathematics* (1938). Various sources claim that the word was coined by Milton Sirotta, estimate his birth year at 1929 and the year of coinage at 1938 or even present the data as exact. This dating is probably based on the year of publication of the 1938 article (stating: “I was walking in the woods with my nephew one day, and I asked the boy to think up any name for the number, any amusing name that entered his head.”—Note that it was “one day”, which is not necessarily the same year!) and the statement in the book *Mathematics and the Imagination* that the nephew was nine years old.

However, Carl Bialik points out the following: “The date for that naming is widely given on Internet encyclopedias and in recent press coverage as the late 1930s, but Dr. Kasner's living relatives say it happened closer to 1920. Milton turned nine in that year, and family archives show Dr. Kasner began referring to the number in lectures soon afterwards.” Indeed, the Social Security Death Index gives the date of birth of Milton and Edwin Sirotta as 8 March 1911 and 11 July 1915, respectively, and their last residence as New York.

It is debatable whether it was really Milton in 1920/1921 or his other nephew, Edwin, in 1924/1925 that Kasner was referring to. It would be clear if we knew that Kasner used the word in lectures before 1924, but Bialik is not precise about that matter, and leaves us alone with: “Ms. Sirotta, 55 years old, adds that, according to her father, "They both came up with it. It's a sore point in my life that Milton gets the credit and my father doesn't get the credit."”

This also needs to be corrected: “Googol was coined in 1938 by a 9-year-old Milton Sirotta when his uncle Edward Kasner, a mathematician and writer, asked for a name for the number. Milton then defined "googolplex" as "1, followed by writing zeroes until you get tired." Kasner, unimpressed with this subjective definition, redefined it to 10^{10100}, or 1 followed by googol zeroes.” (Googology Wiki:About#I heard that googol was coined by a kid. Is this true?)

The book states that the same newphew coined *googolplex*, but it is not clear who defined it as 1, followed by writing zeros until you got tired, and who redefined it as 10^{10100}. -- IvanP (talk) 09:10, March 25, 2016 (UTC)

## Roman numeral based name question

Is this number based on Roman numeral? If yes, I will add [[Category:Roman numeral-based name]] to this article. ARsygo (talk) 06:26, September 15, 2017 (UTC)