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%I #10 Sep 08 2022 08:45:36
%S 31,313,877,971,1723,2099,2287,2381,2663,2851,3697,4073,4261,4637,
%T 4919,5107,5483,5953,6047,6329,7457,7927,8209,8867,9337,9431,9619,
%U 9901,10559,11311,11593,11969,12157,12251,12721,13003,13567,15259,15541,15823,16481
%N Primes congruent to 31 mod 47.
%H Vincenzo Librandi, <a href="/A142382/b142382.txt">Table of n, a(n) for n = 1..1000</a>
%F a(n) ~ 46n log n. - _Charles R Greathouse IV_, Jul 03 2016
%t Select[Prime[Range[2500]], MemberQ[{31}, Mod[#, 47]] &] (* _Vincenzo Librandi_, Aug 27 2012 *)
%o (Magma) [p: p in PrimesUpTo(18000) | p mod 47 eq 31]; // _Vincenzo Librandi_, Aug 27 2012 *)
%o (PARI) is(n)=isprime(n) && n%47==31 \\ _Charles R Greathouse IV_, Jul 03 2016
%Y Cf. A000040.
%K nonn,easy
%O 1,1
%A _N. J. A. Sloane_, Jul 11 2008
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