A255921 Bases b for which no primes p with p < b exist such that p is a base-b Wieferich prime.

2, 3, 4, 6, 11, 12, 14, 15, 16, 20, 34, 36, 39, 47, 52, 56, 58, 59, 66, 72, 83, 84, 86, 87, 88, 90, 92, 95, 96, 102, 103, 104, 106, 108, 111, 114, 119, 123, 135, 139, 140, 142, 144, 156, 159, 160, 162, 167, 171, 175, 180, 183, 186, 187, 194, 198, 200, 203, 204

Offset: 1

Author

Felix Fröhlich, Mar 11 2015

Keywords

• nonn

Comments

Numbers b such that A255920(b) = 0.

Complement of A273786. - Felix Fröhlich, Dec 03 2020

Links

• Felix Fröhlich, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A255920, A255922, A255923, A255924, A255925, A273786.

Programs

PARI

is(b) = forprime(p=1, b-1, if(Mod(b, p^2)^(p-1)==1, return(0))); 1