I need to prove that p congruent modulo 8 to [tex]\pm 1[/tex] for every prime divisor p of [tex]4n^2+4n-1[/tex].(adsbygoogle = window.adsbygoogle || []).push({});

[tex]4n^2+4n-1[/tex] is odd so we have

[tex]p \equiv \pm 1,3,5 \pmod{8}[/tex]

I don't know how to continue from here... I need some hint.

Thanks.

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# Prime divisors of 4n^2+4n-1

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