OFFSET
1,2
PROG
(PARI) is(n)=ispseudoprime(4^n*(2^n-1)-1) \\ Charles R Greathouse IV, Jun 13 2017
(Magma) [k: k in [1..100] | IsPrime(4^k*(2^k-1)-1)]; // Jinyuan Wang, Mar 19 2020
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Pierre CAMI, Oct 11 2004
EXTENSIONS
a(10) from Ray G. Opao, Sep 19 2005
a(11) from Michael S. Branicky, Oct 04 2024
STATUS
approved