OFFSET
1,1
COMMENTS
(68^112-1)/113 is the only known Fermat quotient q_p(b) = (b^(p-1)-1)/p with 1 < b < p and q_p(b) divisible by p^2.
LINKS
G. P. Michon, Prime Factorization of 68^112-1.
EXAMPLE
68^112 == 1 (mod 113^3), but 68^112 =/= 1 (mod 113^4), so 113 appears three times in the sequence.
PROG
(PARI) forprime(p=1, 68^112-1, my(k=1); while(Mod(68, p^k)^112==1, print1(p, ", "); k++))
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
Felix Fröhlich, May 14 2016
STATUS
approved