googolplex

goo·gol·plex
G2O1O1G2O1L1P3L1E1X8
UK/ˈɡuːɡəlplɛks/UK/ˈɡuːɡɒl-/US/ˈɡuɡəlplɛks/US/ˈɡuɡɑl-/

numeral

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

RareFirst used 1920.Scrabble 21

Meanings

numeralgoogolplex (plural googolplexes)

plural googolplexes · alternative misspelling googleplex

  1. The number 10^(10¹⁰⁰) or 10^( text )googol, ten to the power of a googol.First known use 1920.

    Consider that we can start with one googolplex and count: two googolplexes, three googolplexes and so on up to a googolplex googolplexes and beyond—and still not have reached infinity.

    1952, John Wood Campbell Jr., editor, Analog Science Fiction and Fact, New York, N.Y.: Condé Nast Publications, →OCLC, page 164
    3 more examples

    The name "googol" was invented by a child (Dr. Kasner's nine-year-old nephew) who was asked to think up a name for a very big number, namely, 1 with a hundred zeros after it. He was very certain that this number was not infinite, and therefore equally certain that it had to have a name. At the same time that he suggested "googol" he gave a name for a still larger number: "Googolplex." A googolplex is much larger than a googol, but is still finite, as the inventor of the name was quick to point out. It was first suggested that a googolplex should be 1, followed by writing zeros until you got tired. This is a description of what would happen if one actually tried to write a googolplex, but different people get tired at different times and it would never do to have [Primo] Carnera a better mathematician than Dr. [Albert] Einstein, simply because he had more endurance. The googolplex then, is a specific finite number, with so many zeros after the 1 that the number of zeros is a googol. A googolplex is much bigger than a googol, much bigger than a googol times a googol. A googol times a googol would be 1 with 200 zeros, whereas a googolplex is one with a googol of zeros. You will get some idea of the size of this very large but finite number from the fact that there would not be enough room to write it, if you went to the farthest star, touring all the nebulae and putting down zeros every inch of the way.

    1940, Edward Kasner, James [Roy] Newman, “New Names for Old”, in Mathematics and the Imagination, New York, N.Y.: Simon & Schuster, →OCLC, page 23

    If the universe were packed solid with neutrons, say, so there was no empty space anywhere, there would still only be about 10¹²⁸ particles in it, quite a bit more than a googol but trivially small compared to a googolplex.

    1980, Carl Sagan, “chapter IX”, in Cosmos, New York, N.Y.: Random House, →ISBN

    The theoretical number of nucleic acids in DNA, Jack had heard centuries ago, was ten to the power of one hundred and twenty thousand. He couldn't even imagine a number that would hold the set of possible universes, meaning every possible state and position for every particle in every Planck time. Googolplex, he thought, 1 followed by a googol of zeroes: googolplex raised to the power of googolplex.

    2015, K. G. Johansson, Googolplex, [Sweden?]: Affront, →ISBN
  2. figurativelyA countable number.
    2 more examples

    Inflationary theory suggests that the entirety of space is vastly larger. Quantum theory suggests that there are many different copies of space of the same basic kind as ours (same laws of physics). String theory further suggests that there may be many different kinds of space. This whole collection of googolplexes of galaxies within each of googolplexes of different spaces within each of googols of kinds of space makes up an enormously vast universe or multiverse.

    2010, Don N[elson] Page, “Our Place in the Vast Universe”, in Melville Y. Stewart, editor, Science and Religion in Dialogue, volume I, Malden, Mass.: Wiley-Blackwell, →ISBN, page 371

    In some unimaginable future, the universe will stretch so thin that the light from one galaxy would be unable to reach any other galaxy. Eventually, all the stars would burn out, and the universe would consist of the dead cinders of stars, black holes, and uncountable googolplexes of cubic light-years of cold, empty space.

    2014, John [Herbert] Varley, Dark Lightning, New York, N.Y.: Ace Books, →ISBN
  3. USnonstandardrarebusinessAn infinitesimally small portion of land, defined for legal purposes.

    To a mathematician, a googolplex is the figure 1 followed by a googol of zeroes (a googol being the figure 1 followed by a mere 100 zeroes). To a real-estate man, it's one infinitesimal parcel of a plot of land.

    1962, Newsweek: The International Newsmagazine, volume 60, New York, N.Y.: Newsweek LLC, →ISSN, →OCLC, page 54
    1 more example

    Competition among bidders eventually resulted in the discovery of the "Googolplex," a quantity supposedly as near to nothing as possible—one over one with countless zeros [as the size of the portion of land the bidder would accept as security for a tax lien]. This, however, was not the limit of minuteness. The "Googolplex of a Googolplex," or "Gee Gee" for short, became the common bid in the sale of City of Miami tax certificates. There has apparently been no authoritative determination of the effect of an outstanding Miami tax certificate […]

    1976, Ralph E. Boyer, Florida Real Estate Transactions, New York, N.Y.: Matthew Bender & Co., →OCLC, pages 930–931

Origin

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).

Full word history & related roots →

Translations

Basque googolplex
  • googolplexten to the power of a googol
Catalan googolplex
  • googolplexten to the power of a googol
Chinese Mandarin 古戈爾普勒克斯 /古戈尔普勒克斯
  • 古戈爾普勒克斯 /古戈尔普勒克斯 (gǔgē'ěr pǔlēikèsī)ten to the power of a googol
Czech googolplex
  • googolplexten to the power of a googol
Danish googolplex
  • googolplexten to the power of a googol
Dutch googolplex
  • googolplexten to the power of a googol
Esperanto gugloplekso
  • guglopleksoten to the power of a googol
Finnish googolplex
  • googolplexten to the power of a googol
French gogolplex
  • gogolplexten to the power of a googol
German Googolplex
  • Googolplexten to the power of a googol
Greek γκούγκολπλεξ
  • γκούγκολπλεξ (gkoúgkolplex)ten to the power of a googol
Hungarian googolplex
  • googolplexten to the power of a googol
Icelandic googolplex
  • googolplexten to the power of a googol
Indonesian googolplex
  • googolplexten to the power of a googol
Italian googolplex
  • googolplexten to the power of a googol
Japanese グーゴルプレックス
  • グーゴルプレックス (gūgoru-purekkusu)ten to the power of a googol
Korean 구골플렉스
  • 구골플렉스 (gugolpeullekseu)ten to the power of a googol
Latvian gugolplekss
  • gugolplekssten to the power of a googol
Lithuanian gugolpleksas
  • gugolpleksasten to the power of a googol
Norwegian googolplex
  • googolplexten to the power of a googol
Polish googolplex
  • googolplexten to the power of a googol
Portuguese googolplex
  • googolplexten to the power of a googol
Romanian googolplex
  • googolplexten to the power of a googol
Russian гуголплекс
  • гуголплекс (gugolpleks)ten to the power of a googol
Slovak googolplex
  • googolplexten to the power of a googol
Spanish googolplex
  • googolplexten to the power of a googol
Swedish googolplex
  • googolplexten to the power of a googol
Thai กูกอลเพลกซ์
  • กูกอลเพลกซ์ (googonplék)ten to the power of a googol
Turkish googolplex
  • googolplexten to the power of a googol

Rhymes & wordplay

Sounds the same

Cite this entry
APA

googolplex. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/googolplex

MLA

“googolplex.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/googolplex. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “googolplex,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/googolplex.

Source: googolplex on Wiktionary, CC BY-SA 4.0.