A023254 Primes that remain prime through 2 iterations of the function f(x) = 5x + 6.

7, 11, 29, 41, 53, 79, 83, 107, 113, 137, 139, 149, 163, 181, 193, 233, 239, 359, 379, 401, 449, 487, 503, 547, 601, 643, 653, 809, 839, 877, 883, 911, 1009, 1087, 1093, 1103, 1117, 1171, 1259, 1289, 1303, 1367, 1373, 1481, 1511, 1579, 1637, 1747, 1787, 1801

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Comments

Primes p such that 5*p+6 and 25*p+36 are also primes. - Vincenzo Librandi, Aug 04 2010

Links

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

Crossrefs

Subsequence of A081759.

Programs

Magma

[n: n in [0..100000] | IsPrime(n) and IsPrime(5*n+6) and IsPrime(25*n+36)] // Vincenzo Librandi, Aug 04 2010