OFFSET
1,1
MATHEMATICA
Select[Prime[Range[70]], CompositeQ[7^#-6^#]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Mar 12 2019 *)
PROG
(PARI) apmb(a, b, n) = { forprime(x=2, n, y=a^x-b^x; if(!ispseudoprime(y), print1(x", "); ) ) }
CROSSREFS
KEYWORD
nonn
AUTHOR
Cino Hilliard, Oct 26 2003
EXTENSIONS
Offset corrected by Mohammed Yaseen, Jul 18 2022
STATUS
approved