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A107156 Primes of the form 2x^2+25y^2. 2
2, 43, 97, 227, 233, 257, 313, 353, 467, 563, 617, 643, 673, 787, 907, 947, 1193, 1283, 1297, 1483, 1777, 1873, 1907, 2027, 2083, 2153, 2203, 2267, 2273, 2377, 2417, 2617, 2683, 2803, 2963, 3067, 3083, 3187, 3217, 3313, 3593, 3673, 3907 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-200. See A107132 for more information.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

MATHEMATICA

QuadPrimes[2, 0, 25, 10000] (* see A106856 *) Note: the original QuadPrimes had a bug which could sometimes give wrong answers. This sequence should be checked (unless the coefficient of xy in the quadratic form is zero, in which case QuadPrimes gives correct answers). - N. J. A. Sloane, Jun 04 2014

CROSSREFS

Sequence in context: A090194 A107200 A079823 * A062582 A073594 A112097

Adjacent sequences:  A107153 A107154 A107155 * A107157 A107158 A107159

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 13 2005

STATUS

approved

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Last modified July 24 06:42 EDT 2014. Contains 244876 sequences.