A062578 Numbers k such that 12^k - 11^k is prime.

2, 3, 7, 89, 101, 293, 4463, 70067

Offset

1,1

Comments

Terms greater than 1000 may correspond to unproven strong pseudoprimes.

Links

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

Prog

(PARI) is(n)=ispseudoprime(12^n-11^n) \\ Charles R Greathouse IV, May 22 2017

Crossrefs

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

Sequence in context: A247025 A053964 A308730 * A062529 A308917 A058443

Adjacent sequences: A062575 A062576 A062577 * A062579 A062580 A062581

Keyword

nonn,hard

Author

Mike Oakes, May 18 2001, May 19 2001

Extensions

New term 70067 (found in 2006) from Jean-Louis Charton, Sep 02 2009

Edited by M. F. Hasler, Sep 16 2013

Status

approved