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A139974
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Primes of the form 13x^2+40y^2.
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1
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13, 53, 157, 173, 277, 373, 653, 677, 757, 797, 997, 1013, 1093, 1117, 1213, 1277, 1453, 1613, 1637, 1693, 1733, 1933, 1973, 2053, 2213, 2237, 2357, 2557, 2677, 2837, 3253, 3533, 3613, 3637, 3797, 3877, 3917, 4013, 4133, 4157, 4397, 4637
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OFFSET
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1,1
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COMMENTS
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Discriminant=-2080. See A139827 for more information.
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LINKS
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FORMULA
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Except for 13, the primes are congruent to {53, 77, 133, 157, 173, 237, 277, 373, 413, 477, 493, 517} (mod 520).
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MATHEMATICA
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QuadPrimes2[13, 0, 40, 10000] (* see A106856 *)
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PROG
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(Magma) [13] cat [p: p in PrimesUpTo(6000) | p mod 520 in [53, 77, 133, 157, 173, 237, 277, 373, 413, 477, 493, 517]]; // Vincenzo Librandi, Aug 03 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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STATUS
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approved
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