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May
7
awarded  Scholar
May
7
accepted Prove that $x^{2} \equiv -1$ (mod $p$) has no solutions if prime $p \equiv 3\pmod 4$.
May
7
awarded  Student
May
7
asked Prove that $x^{2} \equiv -1$ (mod $p$) has no solutions if prime $p \equiv 3\pmod 4$.