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Primes of form x^2+70*y^2.
2

%I #21 Aug 07 2014 11:55:55

%S 71,79,151,191,239,281,359,401,431,449,569,599,631,641,751,809,911,

%T 919,991,1009,1031,1129,1201,1289,1409,1439,1471,1481,1759,1801,1831,

%U 1871,1999,2039,2081,2111,2129

%N Primes of form x^2+70*y^2.

%D David A. Cox, "Primes of the Form x^2 + n y^2", Wiley, 1989.

%H Vincenzo Librandi and Ray Chandler, <a href="/A033245/b033245.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]

%H N. J. A. Sloane et al., <a href="https://oeis.org/wiki/Binary_Quadratic_Forms_and_OEIS">Binary Quadratic Forms and OEIS</a> (Index to related sequences, programs, references)

%F The primes are congruent to {1, 9, 39, 71, 79, 81, 121, 151, 169, 191, 239, 249} (mod 280). - _T. D. Noe_, Apr 29 2008

%t QuadPrimes2[1, 0, 70, 10000] (* see A106856 *)

%Y Cf. A139643.

%K nonn,easy

%O 1,1

%A _N. J. A. Sloane_.