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A140036 Primes of the form 21x^2+88y^2. 1

%I #16 Sep 08 2022 08:45:34

%S 109,277,373,541,613,877,1117,1381,1429,1597,1789,1933,2053,2221,2389,

%T 2437,3109,3229,3637,4813,4957,5077,5653,5749,5821,6133,6421,6661,

%U 7333,7477,7669,7933,8269,8821,9181,9349,9613,9781,9829,10357,10501

%N Primes of the form 21x^2+88y^2.

%C Discriminant=-7392. See A139827 for more information.

%H Vincenzo Librandi and Ray Chandler, <a href="/A140036/b140036.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 {85, 109, 205, 277, 373, 541, 589, 613, 877, 1117, 1261, 1381, 1429, 1597, 1789} (mod 1848).

%t QuadPrimes2[21, 0, 88, 10000] (* see A106856 *)

%o (Magma) [ p: p in PrimesUpTo(12000) | p mod 1848 in {85, 109, 205, 277, 373, 541, 589, 613, 877, 1117, 1261, 1381, 1429, 1597, 1789} ]; // _Vincenzo Librandi_, Aug 06 2012

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 02 2008

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Last modified May 12 06:47 EDT 2024. Contains 372432 sequences. (Running on oeis4.)