OFFSET
1,2
COMMENTS
All terms under 5000 correspond to certified primes. (Primo 2.2.0 beta). - Ryan Propper, Apr 03 2006
a(11) > 9500. - Jinyuan Wang, Mar 19 2020
PROG
(PARI) is(n)=ispseudoprime((6^n)*(2^n-1)-1) \\ Charles R Greathouse IV, Jun 13 2017
(Magma) [k: k in [1..300] | IsPrime((6^k)*(2^k-1)-1)]; // Jinyuan Wang, Mar 19 2020
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Pierre CAMI, Oct 12 2004
EXTENSIONS
a(11)-a(12) from Michael S. Branicky, Mar 21 2023
STATUS
approved