from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The cardinal number equal to 1036.
  • n. Chiefly British The cardinal number equal to 1066.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. 1036.
  • n. 1066.


from The American Heritage® Dictionary of the English Language, 4th Edition

Latin undecim, ūndecim (ūnus, one; + decem, ten) + (m)illion.


  • The number of addresses that IPv6 allows for amounts to 340 "undecillion" followed by 36 zeroes; enough for a trillion people to each be assigned trillions of IP numbers, according to Beckstrom.

    Yahoo! News: Business - Opinion

  • Net firms are in the process of moving to version 6 of the IP addressing scheme, which offers more than 3 undecillion individual numbers 3 with 38 noughts

    BBC News - Home

  • It can handle a huge number of addresses, 340 undecillion, to be precise.

    SFGate: Top News Stories

  • The solution is IPv6, a new standard for Internet addresses that should provide a lot more room for growth: There are 340 undecillion IPv6 addresses available.

    Reuters: Top News

  • IPv6 offers a maximum of 340 undecillion (trillion trillion trillion) IP addresses.

    The Star Online: Technology

  • Designed as an upgrade to IPv4, IPv6 uses a 128-bit addressing scheme and can support about 3.4 undecillion IP addresses (that's 2 to the 128th power).

    InfoWorld RSS Feed

  • So, what we need, is "only" 340 undecillion computers and it will take less than 1s to find keys

    Doom9's Forum

  • Compared to the IPv4 which could accommodate 4 billion IP addresses, the IPv6 provides a theoretical maximum of 340 undecillion (billion billion billion billion) IP addresses.


  • To put that in a language a little closer to English, that's about 340 undecillion.

    Orient Lodge


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  • Thanks :-)

    July 19, 2008

  • Also quite silly!

    July 19, 2008

  • Or, a centipede on roller skates.

    July 19, 2008

  • 1,000,000,000,000,000,000,000,000,000,000,000,000: a big, silly number.

    July 19, 2008