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16143Wilson's Theory and the number 1

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  • paxtontravis
    Mar 1, 2005
      For those not familiar with Wilson's Theory: P is a prime number if,
      and only if, (P-1)! + 1 is divisible by P.

      Now take the number 1, (1-1)! + 1 = 0! + 1 = 2.
      2 is divisible by 1, so why isn't 1 prime?
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