%I #12 Sep 08 2022 08:45:35
%S 19,577,701,887,1259,1321,1693,1879,2003,2251,2437,3119,3181,3491,
%T 3677,3739,3863,4049,4111,4297,4421,4483,4793,5227,5351,5413,6343,
%U 6529,6653,7211,7459,7583,8017,8389,8513,8699,8761,9133,9257,9319,9629,10559,10993
%N Primes congruent to 19 mod 31.
%H Vincenzo Librandi, <a href="/A142023/b142023.txt">Table of n, a(n) for n = 1..1000</a>
%F a(n) ~ 30n log n. - _Charles R Greathouse IV_, Jul 02 2016
%t Select[Range[19,20000,31],PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Apr 30 2011 *)
%o (Magma) [p: p in PrimesUpTo(12000) | p mod 31 eq 19 ]; // _Vincenzo Librandi_, Aug 27 2012
%o (PARI) is(n)=isprime(n) && n%31==19 \\ _Charles R Greathouse IV_, Jul 02 2016
%Y Cf. A000040, A142005, A142006, A142019.
%K nonn,easy
%O 1,1
%A _N. J. A. Sloane_, Jul 11 2008