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

1,1

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

Prog

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

Crossrefs

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

Sequence in context: A134696 A151677 A304872 * A111338 A029457 A358788

Adjacent sequences: A255918 A255919 A255920 * A255922 A255923 A255924

Keyword

nonn

Author

Felix Fröhlich, Mar 11 2015

Status

approved