A062625 Numbers k such that 59^k - 58^k is prime.

3, 7, 1123, 7489

Offset: 1

Author

Mike Oakes, May 18 2001, May 19 2001

Keywords

• nonn
• hard

Comments

Terms greater than 1000 often correspond only to strong pseudoprimes. [Clarified by M. F. Hasler, Sep 15 2013]

a(5) > 10^5. - Robert Price, Jan 31 2013

Crossrefs

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

Programs

PARI

is(n)=ispseudoprime(59^n-58^n) \\ Charles R Greathouse IV, Jun 13 2017