OFFSET
1,3
COMMENTS
a(26) > 23033. - Jinyuan Wang, Dec 27 2019
a(26) > 50000. - Michael S. Branicky, Jul 08 2024
MATHEMATICA
Do[ If[ PrimeQ[ 5*7^n + 6 ], Print[n] ], {n, 0, 5700} ]
PROG
(PARI) is(n)=ispseudoprime(5*7^n+6) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Robert G. Wilson v, Feb 24 2001
EXTENSIONS
a(21)-a(25) from Jinyuan Wang, Dec 27 2019
STATUS
approved