Monday, August 30, 2010

Geek Secret Pin Numbers

Everyone has their own technique to create their "secret" pin numbers, but if you're a geek, here are some interesting references you're likely to find amusing.

  • 0042 - The answer to the ultimate question of life, the Universe and everything else
  • 1701 - NCC-1701, a.k.a. Star Trek's Enterprise.
  • 1138 - Apparently one of George Lucas favorite numbers.
  • 1969 - the only number under 1,000,000 for which the standard Mod-N Ackermann function doesn't stabilize (go figure that one out...)
  • 1337 - Spells LEET in Leet speak.
  • 3435 - The only four digit Munchausen number (a number that is equal to the sum of its digits each raised to a power equal to the digit.)
  • 5141 - the only four digit number that is reversed in hexadecimal (0x1415)
  • 6174 - Kaprekar's constant

    1. Take any four-digit number, using at least two different digits. (Leading zeros are allowed.)
    2. Arrange the digits in ascending and then in descending order to get two four-digit numbers, adding leading zeros if necessary
    3. Subtract the smaller number from the bigger number
    4. Go back to step 2
    You will always reach 6174 in at most 7 iterations.

[via SpikedMath]

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