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A255203 Primes p for which no bases b with 1 < b < p exist such that p is a base b Wieferich prime. 8
2, 3, 5, 7, 13, 17, 19, 23, 31, 41, 47, 53, 61, 67, 73, 83, 89, 101, 107, 139, 149, 157, 167, 173, 179, 193, 227, 239, 251, 271, 277, 311, 317, 337, 383, 389, 409, 431, 443, 457, 467, 479, 491, 503, 541, 569, 587, 593, 613, 643, 677, 683, 691, 709, 719, 733 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

p = prime(n) such that A242830(n) = 0.

LINKS

Table of n, a(n) for n=1..56.

PROG

(PARI) forprime(p=1, , b=2; i=0; while(b < p, if(Mod(b, p^2)^(p-1)==1, i++); b++); if(i==0, print1(p, ", ")))

CROSSREFS

Cf. A255204, A255205, A255206, A255207, A255208, A255209, A255210.

Sequence in context: A162338 A052015 A042992 * A233577 A233041 A049567

Adjacent sequences:  A255200 A255201 A255202 * A255204 A255205 A255206

KEYWORD

nonn

AUTHOR

Felix Fröhlich, Feb 17 2015

STATUS

approved

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Last modified January 26 17:34 EST 2020. Contains 331280 sequences. (Running on oeis4.)