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Thread: Working with 2^n+1

  1. #1
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    Working with 2^n+1

    Whats up everybody.

    I am trying to prove that if n is a natural number and 2^n+1 is a prime then n has the form 2^r (r is a natural number).

    Can some pleae helt me her started.

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  2. #2
    MHF Contributor
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    Re: Working with 2^n+1

    Thanks from topsquark and HallsofIvy
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