A023257 Primes that remain prime through 2 iterations of function f(x) = 6x + 5.

2, 11, 13, 17, 31, 37, 41, 43, 71, 73, 79, 83, 97, 137, 139, 151, 163, 181, 191, 193, 197, 269, 277, 307, 317, 347, 373, 409, 431, 503, 577, 743, 811, 823, 911, 919, 941, 967, 983, 1021, 1033, 1049, 1051, 1093, 1163, 1187, 1201, 1361, 1373, 1423, 1493, 1571, 1597

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Comments

Primes p such that 6*p+5 and 36*p+35 are also primes. - Vincenzo Librandi, Aug 04 2010

Links

• John Cerkan, Table of n, a(n) for n = 1..10000

Crossrefs

Subsequence of A023221.

Programs

Magma

[n: n in [1..100000] | IsPrime(n) and IsPrime(6*n+5) and IsPrime(36*n+35)] // Vincenzo Librandi, Aug 04 2010