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A038956
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Primes p such that 71 is not a square mod p.
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1
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3, 13, 17, 19, 41, 43, 53, 61, 79, 83, 97, 103, 107, 113, 131, 137, 149, 151, 167, 173, 179, 181, 191, 193, 197, 199, 223, 241, 251, 257, 263, 269, 271, 281, 311, 317, 337, 349, 353, 359, 367, 379, 389, 397, 401
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OFFSET
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1,1
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COMMENTS
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Also, only entries p=1 (mod 4) of the sequence are not squares mod 71 (from the quadratic reciprocity law). - Lekraj Beedassy, Jul 21 2004
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LINKS
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MATHEMATICA
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Select[Prime@Range[120], JacobiSymbol[71, #] == - 1 &] (* Vincenzo Librandi, Sep 09 2012 *)
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PROG
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(Magma) [ p: p in PrimesUpTo(401) | not IsSquare(R! 71) where R:= ResidueClassRing(p) ]; // Vincenzo Librandi, Sep 10 2012
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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