A255838 - OEIS

A255838

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

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

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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

STATUS

approved