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A062654
Numbers k such that 88^k - 87^k is prime or a strong pseudoprime.
0
5, 7, 19, 241, 607, 74047
OFFSET
1,1
COMMENTS
All terms must be prime. - M. F. Hasler, Sep 21 2013
a(7) > 10^5. - Robert Price, May 28 2015
MATHEMATICA
Select[Range[0, 1000], PrimeQ[88^# - 87^#] &] (* Robert Price, May 28 2015 *)
PROG
(PARI) is(n)=ispseudoprime(88^n-87^n) \\ Charles R Greathouse IV, Jun 13 2017
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
Edited by M. F. Hasler, Sep 21 2013
a(6) from Robert Price, May 28 2015 (computer run by Adam Marciniec)
STATUS
approved