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%I #16 Sep 08 2022 08:45:37
%S 3,67,131,643,1091,1283,1667,1987,2179,2243,2371,2819,3011,3203,3331,
%T 3779,3907,4099,4483,4547,4931,5059,5443,5507,5827,6211,6659,7043,
%U 8387,8707,8963,9091,9283,9539,9859,9923,10243,10499,10627,10691,10883,11587,11779
%N Primes congruent to 3 mod 64.
%H Vincenzo Librandi, <a href="/A142926/b142926.txt">Table of n, a(n) for n = 1..1000</a>
%t lst={};Do[p=Prime[n];If[Mod[p,64]==3,AppendTo[lst,p]],{n,7!}];lst (* _Vladimir Joseph Stephan Orlovsky_, Feb 26 2009 *)
%t Select[Prime[Range[1800]], MemberQ[{3}, Mod[#, 64]] &] (* _Vincenzo Librandi_, Sep 06 2012 *)
%t Select[Range[3,12000,64],PrimeQ] (* _Harvey P. Dale_, Jan 07 2022 *)
%o (Magma) [p: p in PrimesUpTo(12000) | p mod 64 eq 3]; // _Vincenzo Librandi_, Sep 06 2012
%Y Cf. A000040.
%K nonn,easy
%O 1,1
%A _N. J. A. Sloane_, Jul 11 2008