A062632 - OEIS

%I #19 Jul 04 2021 09:00:21

%S 2,7,47,61,73,317,4447,32749,72047,99581

%N Numbers k such that 66^k - 65^k is prime.

%C Terms greater than 1000 are often only strong pseudoprimes.

%C a(11) > 10^5. - _Robert Price_, Sep 03 2013

%o (PARI) is(n)=ispseudoprime(66^n-65^n) \\ _Charles R Greathouse IV_, Jun 13 2017

%Y Cf. A000043, A057468, A059801, A059802, A062572-A062666.

%K nonn,hard

%O 1,1

%A _Mike Oakes_, May 18 2001, May 19 2001

%E a(8)-a(10) (Computed by Adam Marciniec) from _Robert Price_, Sep 03 2013