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A038875
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Primes p with legendre(3,p) = -1.
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5
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2, 5, 7, 17, 19, 29, 31, 41, 43, 53, 67, 79, 89, 101, 103, 113, 127, 137, 139, 149, 151, 163, 173, 197, 199, 211, 223, 233, 257, 269, 271, 281, 283, 293, 307, 317, 331, 353, 367, 379, 389, 401, 439, 449, 461, 463, 487, 499, 509, 521, 523, 547, 557, 569, 571, 593
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OFFSET
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1,1
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COMMENTS
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Apart from the first term, primes p such that 3 is not a square mod p.
Apart from the first term, identical to A003630.
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LINKS
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MATHEMATICA
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Select[Prime@Range[120], JacobiSymbol[3, #] == -1 &] (* Vincenzo Librandi, Sep 09 2012 *)
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PROG
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(PARI) isok(p) = isprime(p) && (kronecker(3, p) == -1); \\ Michel Marcus, Jan 24 2023
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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