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Math Help - root question

  1. #1
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    root question

    Let n be a natural number. Determine the set of prime numbers p such
    that −1 is a n-th power modulo p.(that is, such that there exists an integer
    a^n such that an  −1 (mod p)).
    (Hint: the case n = 1 is trivial, and we have
    done the case n = 2 in class. What can you say in the case n odd? and in
    the case where n is a power of 2? Then we can get the general case).
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  2. #2
    MHF Contributor Bruno J.'s Avatar
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    Seems to me like you copy-pasted your assignment problem.
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