A062628 Numbers k such that 62^k - 61^k is prime.

17, 23, 421, 1303, 6163, 17117, 18439, 74521

Offset

1,1

Comments

Terms greater than 1000 are often only strong pseudoprimes.

All terms are primes. - Robert Price, May 07 2013

a(9) > 10^5. - Robert Price, May 07 2013

Links

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

Prog

(PARI) is(n)=ispseudoprime(62^n-61^n) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

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

Sequence in context: A250640 A344636 A108260 * A127907 A070687 A205697

Adjacent sequences: A062625 A062626 A062627 * A062629 A062630 A062631

Keyword

nonn,hard

Author

Mike Oakes, May 18 2001, May 19 2001

Extensions

a(6)-a(8) (Computer runs by Adam Marciniec) from Robert Price, May 07 2013

Status

approved