OFFSET
1,1
COMMENTS
a(10), if it exists, is larger than approximately 5.9*10^13, corresponding to the first odd Wieferich prime in base 29 (see Fischer link).
LINKS
PROG
(PARI) forprime(b=1, 20, forprime(p=b, , if(Mod(b, p^2)^(p-1)==1, print1(p, ", "); break({1}))))
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Felix Fröhlich, Mar 07 2015
STATUS
approved