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Math Help - Find a prime factor of 99!-1

  1. #1
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    Exclamation Find a prime factor of 99!-1

    Find a prime factor of 99!-1
    Last edited by Math Help; June 9th 2005 at 05:32 PM.
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  2. #2
    hpe
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    Quote Originally Posted by cornoth
    Find a prime factor of 99!-1
    101, because 101 is prime and  99! \equiv -100! \equiv 1 in  Z_{101}
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  3. #3
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    oh thats right, wilson's theorem.
    thanks hpe!
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