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A227174
Numbers n such that (140^n + 139^n)/279 is prime.
1
23, 41, 43, 151, 2927, 6133
OFFSET
1,1
COMMENTS
All terms are prime.
a(7) > 10^4.
a(7) > 43400. - Lucas A. Brown, Nov 26 2020
PROG
(PARI) is(n)=ispseudoprime((140^n+139^n)/279) \\ Charles R Greathouse IV, Jun 13 2017
KEYWORD
hard,nonn,more
AUTHOR
Jean-Louis Charton, Jul 03 2013
STATUS
approved