A062633 Numbers k such that 67^k - 66^k is prime.

3, 5, 43, 2399, 88037

Offset

1,1

Comments

Terms greater than 1000 are often only strong pseudoprimes.

a(6) > 10^5. - Robert Price, Oct 03 2013

Links

Table of n, a(n) for n=1..5.

Prog

(PARI) is(n)=ispseudoprime(67^n-66^n) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

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

Sequence in context: A191088 A191089 A199345 * A240559 A361904 A352088

Adjacent sequences: A062630 A062631 A062632 * A062634 A062635 A062636

Keyword

nonn,hard

Author

Mike Oakes, May 18 2001, May 19 2001

Extensions

a(5) from Robert Price, Oct 03 2013 (Computer run by Adam Marciniec)

Status

approved