A186104 Primes of the form 3*6^k - 1.

2, 17, 107, 647, 23327, 139967, 30233087, 6530347007, 39182082047, 14215144014964850687, 240614901699187213221099227578367, 53193679461858262403856737876228196870083927814929645567

Offset: 1

Author

Gilbert Mozzo, Feb 12 2011

Keywords

• nonn
• changed

Links

• Charles R Greathouse IV, Table of n, a(n) for n = 1..21

Crossrefs

For the exponents k see A186106.

Programs

Magma

[3*6^n-1: n in [0..140] | IsPrime(3*6^n-1)]; // Bruno Berselli, Feb 12 2011

PARI

v=[];for(n=0,1e3,if(ispseudoprime(k=3*6^n-1),v=concat(v,k)));v \\ Charles R Greathouse IV, Jul 26 2011

Extensions

Edited by N. J. A. Sloane, Feb 12 2011