A062629 Numbers k such that 63^k - 62^k is prime.

3, 59, 3499, 3571

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(5) > 10^5. - Robert Price, Jun 05 2013

Crossrefs

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

Programs

PARI

is(n)=ispseudoprime(63^n-62^n) \\ Charles R Greathouse IV, Jun 13 2017