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omega16
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Can anyone help me with this question?
Suppose (a, b)=1 . Prove that if p is any odd prime which divides a^2 + b^2 then p ≡ 1 ( mod 4).
Suppose (a, b)=1 . Prove that if p is any odd prime which divides a^2 + b^2 then p ≡ 1 ( mod 4).