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Math Help - show that n is an integer number thoery problem

  1. #1
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    Question show that n is an integer number thoery problem

    so we have that a=2 is a misleader
    and the question is 1. let p>5 be prime and let n= 4^(p)+1/5 show that n is an integer
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  2. #2
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    Re: Show that n is an integer [number theory problem]

    4^p+1 is divisible by 5 for any odd positive integer p, not just odd primes. Hint: 4^p+1=(5-1)^p+1.
    Thanks from emakarov
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