A062655 Numbers k such that 89^k - 88^k is prime.

3, 5, 997, 4253, 52511, 59221

Offset

1,1

Comments

Terms greater than 1000 are often only strong pseudoprimes.

a(7) > 10^5. - Robert Price, Jun 16 2015

Links

Table of n, a(n) for n=1..6.

Mathematica

Select[Range[0, 100000], PrimeQ[89^# - 88^#] &] (* Robert Price, Jun 16 2015 *)

Prog

(PARI) is(n)=ispseudoprime(89^n-88^n) \\ Charles R Greathouse IV, Jun 12 2017

Crossrefs

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

Sequence in context: A119497 A298094 A012783 * A364547 A368462 A090807

Adjacent sequences: A062652 A062653 A062654 * A062656 A062657 A062658

Keyword

nonn,hard

Author

Mike Oakes, May 18 2001, May 19 2001

Extensions

a(5)-a(6) from Robert Price (computer run by Adam Marciniec), Jun 16 2015

Status

approved