From French quintilliard, equivalent to quint- +‎ -illiard.


quintilliard (plural quintilliards) (rare)

  1. A thousand million million million million million: 1 followed by thirty-three zeros, 1033.
    • 1883 December 29, “Stella”, correspondent, “Continental Gossip”, in The Sydney Morning Herald, number 14,276, Sydney, N.S.W., page 6, column 2:
      A second computator, taking up the inquiry at the point at which it has been left by the first proposer of the query, has shown that the number of “ascendants” increasing in geometrical ratio with each generation back, the number of forbears computed to the 37th degree, exceeds the total population of the earth from that time downwards; while, counted up to half the time from Adam, we come to a number of quintilliards probably large enough to people all the planets of our system; proving, according to the judicious reflection of this novel inquirer, that the entire human race must have had the same grandfathers and grandmothers over and over again, and that, consequently, so far from priding themselves on imaginary superiority of pedigree, all men should regard one another as cousins.
    • 2000 September 1, Furqan Syed, “Children of DES: A Look at the Advanced Encryption Standard”, in Network Security, DOI:10.1016/S1353-4858(00)09026-7, pages 11–12:
      With the Triple DES implementation of DES, there are 5 100 000 000 000 000 000 000 000 000 000 000 (5.1 quintilliard) or more possible encryption keys that can be used.
    • 2019, Pierre Laperdrix; Gildas Avoine; Benoit Baudry; Nick Nikiforakis, “Morellian Analysis for Browsers: Making Web Authentication Stronger with Canvas Fingerprinting”, in Roberto Perdisci, Clémentine Maurice, Giorgio Giacinto, and Magnus Almgren, editors, Detection of Intrusions and Malware, and Vulnerability Assessment: 16th International Conference, DIMVA 2019; Gothenburg, Sweden, June 19–20, 2019; Proceedings (Lecture Notes in Computer Science), Springer Nature Switzerland AG, DOI:10.1007/978-3-030-22038-9, →ISBN, ISSN 1611-3349, page 58:
      Taking into account practical implications, storing all responses would occupy 2.3 × 1050 bits with an average of 10 kb per response. It would take several quintilliard years on a Gigabit internet connection to transfer everything without considering possible network instabilities and congestion.



See alsoEdit


French numbers (edit)
 ←  1027  ←  1030 1033 1036  →  1039  → 
    Cardinal (traditional spelling): un quintilliard
    Cardinal (post-1990 spelling): un-quintilliard
    Ordinal: quintilliardième
French Wikipedia article on 1033


From quint- (five) +‎ -illiard.


  • IPA(key): /kɛ̃.ti.ljaʁ/, /kɥɛ̃.ti.ljaʁ/
  • (file)


quintilliard m (plural quintilliards)

  1. decillion (1033)