A255838 Smallest base-b Wieferich prime larger than b, where b = prime(n).

1093, 11, 20771, 491531, 71, 863, 46021, 43, 2481757

Offset: 1

Author

Felix Fröhlich, Mar 07 2015

Keywords

• nonn
• hard
• more

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

• R. Fischer, Thema: Fermatquotient B^(P-1) == 1 (mod P^2)

Crossrefs

Cf. A247072.

Programs

PARI

forprime(b=1, 20, forprime(p=b, , if(Mod(b, p^2)^(p-1)==1, print1(p, ", "); break({1}))))