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A139857
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Primes of the form 8x^2+15y^2.
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2
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23, 47, 167, 263, 383, 503, 647, 743, 863, 887, 983, 1103, 1223, 1367, 1487, 1583, 1607, 1823, 1847, 2063, 2087, 2207, 2423, 2447, 2543, 2663, 2687, 2903, 2927, 3023, 3167, 3407, 3527, 3623, 3767, 3863, 4007, 4127, 4463, 4583, 4703, 4943
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Discriminant=-480. See A139827 for more information.
Also primes of the form 12x^2+12xy+23y^2, which has discriminant=-960. - T. D. Noe (noe(AT)sspectra.com), May 07 2008
Also primes of the forms 23x^2+22xy+47y^2 and 23x^2+8xy+32y^2. See A140633. - T. D. Noe (noe(AT)sspectra.com), May 19 2008
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FORMULA
| The primes are congruent to {23, 47} (mod 120).
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MATHEMATICA
| QuadPrimes[8, 0, 15, 10000] (* see A106856 *)
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CROSSREFS
| Sequence in context: A042048 A042050 * A139900 A065017 A140618 A042052
Adjacent sequences: A139854 A139855 A139856 * A139858 A139859 A139860
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KEYWORD
| nonn,easy
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AUTHOR
| T. D. Noe (noe(AT)sspectra.com), May 02 2008
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