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Primes congruent to {1, 2, 3, 6} mod 19.
1

%I #5 Sep 08 2022 08:46:03

%S 2,3,41,59,79,97,101,139,173,191,193,211,229,269,307,367,383,401,419,

%T 421,439,443,457,557,571,647,709,743,761,823,839,857,877,937,953,971,

%U 991,1009,1013,1051,1103,1123,1181,1217,1237,1279,1409,1427,1447,1483

%N Primes congruent to {1, 2, 3, 6} mod 19.

%H Vincenzo Librandi, <a href="/A215385/b215385.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Prime[Range[300]],MemberQ[{1,2,3,6},Mod[#,19]]&]

%o (Magma) [p: p in PrimesUpTo(1500) | p mod 19 in [1, 2, 3, 6]];

%Y Cf. A000040, A045340.

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Aug 10 2012