A062621 Numbers k such that 55^k - 54^k is prime.

2, 5, 7, 701

Offset

1,1

Comments

a(5) > 10^5. - Robert Price, Nov 05 2012

Links

Table of n, a(n) for n=1..4.

Prog

(PARI) is(n)=ispseudoprime(55^n-54^n) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

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

Sequence in context: A252283 A007571 A350590 * A306748 A344655 A241292

Adjacent sequences: A062618 A062619 A062620 * A062622 A062623 A062624

Keyword

nonn,hard

Author

Mike Oakes, May 18 2001, May 19 2001

Status

approved