A062582 Numbers k such that 16^k - 15^k is prime.

2, 43, 211, 1523, 1579, 1693, 12281, 24889

Offset

1,1

Comments

Terms greater than 1000 may correspond to (unproven) strong pseudoprimes.

No other terms less than 100000. - Robert Price, Apr 15 2012

Links

Table of n, a(n) for n=1..8.

Henri Lifchitz and Renaud Lifchitz, Top probable primes of the form 16^p-15^p

Prog

(PARI) is(n)=ispseudoprime(16^n-15^n) \\ Charles R Greathouse IV, Jun 12 2017

Crossrefs

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

Sequence in context: A107200 A079823 A107156 * A073594 A349927 A112097

Adjacent sequences: A062579 A062580 A062581 * A062583 A062584 A062585

Keyword

nonn,hard,more

Author

Mike Oakes, May 18 2001, May 19 2001

Extensions

a(7) (found by Mike Oakes in August 2003) and a(8) (found by Jean-Louis Charton in December 2010) from Jean-Louis Charton, Mar 19 2011

Edited by M. F. Hasler, Sep 16 2013

Status

approved