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A140008 Primes of the form 24x^2+55y^2. 2

%I #17 Sep 08 2022 08:45:34

%S 79,151,271,439,919,1231,1399,1471,1759,1999,2239,2551,2719,2791,3079,

%T 3319,3511,3559,4111,4231,4639,4759,4831,5431,6079,6151,6199,6679,

%U 6871,6991,7039,8191,8311,8599,8719,8839,9151,9319,9391,9511,9631

%N Primes of the form 24x^2+55y^2.

%C Discriminant = -5280. See A139827 for more information.

%C Also primes of the form 39x^2+36xy+76y^2. See A140633. - _T. D. Noe_, May 19 2008

%H Vincenzo Librandi and Ray Chandler, <a href="/A140008/b140008.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 {79, 151, 271, 391, 439, 679, 799, 871, 919, 1231} (mod 1320).

%t QuadPrimes2[24, 0, 55, 10000] (* see A106856 *)

%o (Magma) [p: p in PrimesUpTo(12000) | p mod 1320 in [79, 151, 271, 391, 439, 679, 799, 871, 919, 1231]]; // _Vincenzo Librandi_, Aug 04 2012

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 02 2008

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Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)