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A140628
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Primes of the form 39x^2+6xy+71y^2.
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1
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71, 239, 311, 599, 719, 1151, 1319, 1439, 1511, 1559, 1871, 2111, 2879, 2999, 3359, 3719, 3911, 4079, 4271, 4751, 4871, 5039, 5279, 5591, 5639, 6311, 6719, 6791, 6959, 7079, 8039, 8951, 8999, 9239, 9431, 9479, 9551, 9719, 9791, 9839, 10151
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OFFSET
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1,1
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COMMENTS
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Discriminant=-11040. Also primes of the form 71x^2+70xy+95y^2.
In base 12, the sequence is 5E, 17E, 21E, 41E, 4EE, 7EE, 91E, 9EE, X5E, X9E, 10EE, 127E, 17EE, 189E, 1E3E, 219E, 231E, 243E, 257E, 28EE, 299E, 2XEE, 307E, 329E, 331E, 379E, 3X7E, 3E1E, 403E, 411E, 479E, 521E, 525E, 541E, 555E, 559E, 563E, 575E, 57EE, 583E, 5X5E, where X is 10 and E is 11. Moreover, the discriminant is -6480. - Walter Kehowski, Jun 01 2008
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LINKS
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MATHEMATICA
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Union[QuadPrimes2[39, 6, 71, 10000], QuadPrimes2[39, -6, 71, 10000]] (* see A106856 *)
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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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