A045366 - OEIS

%I #20 Sep 08 2022 08:44:55

%S 2,5,13,29,37,53,61,101,109,149,157,173,181,197,229,269,277,293,317,

%T 349,373,389,397,421,461,509,541,557,613,653,661,677,701,709,733,757,

%U 773,797,821,829,853,877,941,997

%N Primes congruent to {2, 5} mod 8.

%H Ray Chandler, <a href="/A045366/b045366.txt">Table of n, a(n) for n = 1..10000</a> (first 1000 terms from Vincenzo Librandi)

%H H. Quan, F. Roman, M. Washington, <a href="http://www.msri.org/system/cms/files/81/files/original/Research_Reports_2014_MSRI-UP_(Single_File).pdf">Infinite products and periodic sequences</a>, in MSRI-UP Research Reports, 2014, pp. 60-91.

%t Select[Prime[Range[300]],MemberQ[{2,5},Mod[#,8]]&] (* _Vincenzo Librandi_, Aug 10 2012 *)

%o (Magma) [p: p in PrimesUpTo(1200) | p mod 8 in [2, 5]]; // _Vincenzo Librandi_, Aug 10 2012

%Y Essentially the same as A007521.

%Y Cf. A000040, A045368.

%K nonn,easy

%O 1,1

%A _N. J. A. Sloane_