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A106940 Primes of the form 4x^2+3xy+5y^2, with x and y any integer. 1

%I #17 Aug 05 2014 14:16:29

%S 5,43,73,79,131,167,179,229,263,359,367,373,521,569,577,617,811,877,

%T 881,947,953,997,1009,1021,1051,1151,1163,1213,1223,1231,1279,1283,

%U 1307,1409,1429,1439,1567,1607,1697,1741,1747,1783,1823,1861,1889

%N Primes of the form 4x^2+3xy+5y^2, with x and y any integer.

%C Discriminant=-71.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106940/b106940.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 Union[QuadPrimes2[4, 3, 5, 10000], QuadPrimes2[4, -3, 5, 10000]] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005

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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)