Etymology

googolplex

goo·gol·plex
G2O1O1G2O1L1P3L1E1X8

Today it means: The number 10^(10¹⁰⁰) or 10^( text )googol, ten to the power of a googol. Full definition →

First used 1920.
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The story

From googol + -plex, coined by American mathematician Milton Sirotta in 1920 who was then the young nephew of mathematician Edward Kasner. First published and defined in the book Mathematics and the Imagination (1940).

First known use, by meaning

  • from 1920. The number 10^(10¹⁰⁰) or 10^( text )googol, ten to the power of a googol.

Etymology from Wiktionary, CC BY-SA 4.0.