A062618 Numbers k such that 52^k - 51^k is prime.

2, 29, 109, 179, 14923

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(6) > 10^5. - Robert Price, Nov 28 2012

Crossrefs

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

Programs

PARI

is(n)=ispseudoprime(52^n-51^n) \\ Charles R Greathouse IV, Jun 13 2017

Extensions

a(5) from Robert Price, Nov 28 2012