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%I #18 Feb 10 2017 14:26:15
%S 79,139,271,331,349,421,661,691,739,751,829,859,1201,1231,1249,1321,
%T 1459,1489,1669,1699,1831,1879,2011,2131,2161,2551,2659,2749,2791,
%U 3049,3061,3109,3229,3319,3541,3691,3739,3919,3931,4021,4159,4519
%N Primes of the form x^2 + 75y^2.
%C Discriminant = -300. See A107132 for more information.
%H Vincenzo Librandi and Ray Chandler, <a href="/A107184/b107184.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)
%t QuadPrimes2[1, 0, 75, 10000] (* see A106856 *)
%o (PARI) list(lim)=my(v=List(),w,t); for(x=1, sqrtint(lim\1), w=x^2; for(y=1, sqrtint((lim-w)\75), if(isprime(t=w+75*y^2), listput(v,t)))); Set(v) \\ _Charles R Greathouse IV_, Feb 10 2017
%K nonn,easy
%O 1,1
%A _T. D. Noe_, May 13 2005