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A140632
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Primes of the form 55x^2+10xy+199y^2.
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2
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199, 439, 1039, 1231, 1951, 2239, 2551, 2791, 3559, 3631, 4759, 5431, 6991, 7159, 7591, 8839, 9439, 10111, 11119, 11311, 11959, 13159, 13711, 13831, 14479, 14551, 15391, 15679, 15991, 16519, 16831, 17239, 17359, 17839, 17911, 18199, 18919
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OFFSET
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1,1
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COMMENTS
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Discriminant=-43680. Also primes of the form 159x^2+120xy+160y^2.
In base 12, the sequence is 147, 307, 727, 867, 1167, 1367, 1587, 1747, 2087, 2127, 2907, 3187, 4067, 4187, 4487, 5147, 5567, 5X27, 6527, 6667, 6E07, 7747, 7E27, 8007, 8467, 8507, 8XX7, 90X7, 9307, 9687, 98X7, 9E87, X067, X3X7, X447, X647, XE47, where X is 10 and E is 11. Moreover, the discriminant is -21340. - Walter Kehowski, Jun 01 2008
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LINKS
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MATHEMATICA
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Union[QuadPrimes2[55, 10, 199, 10000], QuadPrimes2[55, -10, 199, 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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