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Math Help - congruence identity

  1. #1
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    congruence identity

    Hi,
    ineed help with the exercise below:
    Thanks in advance

    Let p be a prime number.prove:
    (2*4*6*...(p-1))^2=(-1)^((p+1)/2)mod(p)
    THANKS IN ADVANCE
    Last edited by hedi; March 6th 2014 at 06:30 AM.
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  2. #2
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    Re: congruence identity

    use wilson's theorem
    Thanks from hedi
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  3. #3
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    Re: congruence identity

    Yes,i did thank you.
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