A062632 Numbers k such that 66^k - 65^k is prime.

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

Offset: 1

Author

Mike Oakes, May 18 2001, May 19 2001

Keywords

• nonn
• hard

Comments

Terms greater than 1000 are often only strong pseudoprimes.

a(11) > 10^5. - Robert Price, Sep 03 2013

Crossrefs

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

Programs

PARI

is(n)=ispseudoprime(66^n-65^n) \\ Charles R Greathouse IV, Jun 13 2017

Extensions

a(8)-a(10) (Computed by Adam Marciniec) from Robert Price, Sep 03 2013