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A139986 Primes of the form 5x^2+168y^2. 1
5, 173, 293, 677, 773, 797, 1013, 1277, 1613, 1637, 1973, 2357, 2477, 2693, 2957, 3533, 3797, 4133, 4157, 4373, 4493, 4637, 4877, 4973, 5333, 5477, 5717, 5813, 6053, 6173, 6317, 6653, 7013, 7517, 7853, 8237, 8573, 8693, 8837, 9173, 9413 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-3360. See A139827 for more information.

LINKS

Vincenzo Librandi and Ray Chandler, Table of n, a(n) for n = 1..10000 [First 1000 terms from Vincenzo Librandi]

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

FORMULA

Except for 5, the primes are congruent to {173, 293, 437, 677, 773, 797} (mod 840).

MATHEMATICA

QuadPrimes2[5, 0, 168, 10000] (* see A106856 *)

PROG

(MAGMA) [5] cat [p: p in PrimesUpTo(10000) | p mod 840 in [173, 293, 437, 677, 773, 797]]; // Vincenzo Librandi, Aug 03 2012

CROSSREFS

Sequence in context: A220640 A198711 A210927 * A123111 A303154 A060070

Adjacent sequences:  A139983 A139984 A139985 * A139987 A139988 A139989

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 02 2008

STATUS

approved

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Last modified March 23 12:43 EDT 2019. Contains 321430 sequences. (Running on oeis4.)