A062644 Numbers k such that 78^k - 77^k is prime.

7, 5749

Offset

1,1

Comments

Terms > 1000 are often only strong pseudoprimes.

a(3) > 10^5. - Robert Price, Oct 04 2014

Links

Table of n, a(n) for n=1..2.

Prog

(PARI) is(n)=ispseudoprime(78^n-77^n) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

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

Sequence in context: A219893 A243780 A246519 * A103174 A203693 A125036

Adjacent sequences: A062641 A062642 A062643 * A062645 A062646 A062647

Keyword

nonn,hard,bref,more

Author

Mike Oakes, May 18 2001, May 19 2001

Status

approved