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

3, 7, 1123, 7489

Offset

1,1

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

Links

Table of n, a(n) for n=1..4.

Prog

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

Crossrefs

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

Sequence in context: A065244 A012844 A104052 * A175986 A296351 A349007

Adjacent sequences: A062622 A062623 A062624 * A062626 A062627 A062628

Keyword

nonn,hard

Author

Mike Oakes, May 18 2001, May 19 2001

Status

approved