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A139666
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Primes of the form x^2 + 1320*y^2.
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2
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1321, 1489, 1609, 2161, 2281, 2689, 3001, 3169, 3529, 4129, 4801, 5281, 5449, 5569, 5641, 6121, 6361, 6961, 7129, 7489, 7561, 7681, 8089, 8209, 8761, 9001, 9241, 9601, 9769, 10321, 10729, 12049, 12241, 12409, 12721, 12841, 13249, 13729
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OFFSET
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1,1
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COMMENTS
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Discriminant = -5280. See A139643 for more information.
The primes are congruent to {1, 49, 169, 289, 361, 529, 841, 889, 961, 1081} (mod 1320).
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LINKS
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MATHEMATICA
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QuadPrimes2[1, 0, 1320, 10000] (* see A106856 *)
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PROG
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(Magma) [ p: p in PrimesUpTo(15000) | p mod 1320 in {1, 49, 169, 289, 361, 529, 841, 889, 961, 1081}]; // Vincenzo Librandi, Jul 29 2012
(Magma) k:=1320; [p: p in PrimesUpTo(14000) | NormEquation(k, p) eq true]; // Bruno Berselli, Jun 01 2016
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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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STATUS
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approved
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