A062626 Numbers k such that 60^k - 59^k is prime.

4663, 8839, 14779

Offset: 1

Author

Mike Oakes, May 18 2001, May 19 2001

Keywords

• nonn
• hard
• bref

Comments

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

a(4) > 10^5. - Robert Price, Mar 01 2013

Links

• H. Lifchitz, R. Lifchitz, PRP top records (of the form 60^n-59^n)

Crossrefs

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

Programs

PARI

is(n)=ispseudoprime(60^n-59^n) \\ Charles R Greathouse IV, Jun 13 2017

Extensions

a(3) from Robert Price, Mar 01 2013