A062630 Numbers k such that 64^k - 63^k is prime.

2, 3, 11, 31, 349, 379, 14669, 19001, 49957, 68909

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, Jul 08 2013

Crossrefs

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

Programs

PARI

is(n)=ispseudoprime(64^n-63^n) \\ Charles R Greathouse IV, Jun 13 2017

Extensions

a(7)-a(10) from Robert Price, Jul 08 2013