A062651 Numbers k such that 85^k - 84^k is prime.

179, 479

Offset: 1

Author

Mike Oakes, May 18 2001, May 19 2001

Keywords

• nonn
• hard
• bref

Comments

Terms greater than 1000 are often only strong pseudoprimes.

a(3) > 10^5. - Robert Price, Mar 26 2015

Crossrefs

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

Programs

PARI

is(n)=ispseudoprime(85^n-84^n) \\ Charles R Greathouse IV, Jun 13 2017