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A325885 Bases b where exactly nine primes p with p < b exist such that p is a base-b Wieferich prime. 9
10768, 24599, 27557, 29957, 33301, 35397, 45009, 49085, 55241, 60661, 63290, 69389, 89101, 90607, 93657, 101305, 103751, 105657, 117618, 120473, 123824, 126449, 129473, 132857, 133524, 133948, 138149, 138896, 143882, 147717, 150793, 152985, 159317, 168920 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers n such that A255920(n) = 9.

LINKS

Table of n, a(n) for n=1..34.

PROG

(PARI) is(n) = my(i=0); forprime(p=1, n-1, if(Mod(n, p^2)^(p-1)==1, i++)); i==9

CROSSREFS

Cf. A255920.

Cf. bases b with exactly k base-b Wieferich primes less than b: A255921 (k=0), A255922 (k=1), A255923 (k=2), A255924 (k=3), A255925 (k=4), A325881 (k=5), A325882 (k=6), A325883 (k=7), A325884 (k=8), A325886 (k=10).

Sequence in context: A258506 A254993 A023084 * A034231 A229275 A345572

Adjacent sequences:  A325882 A325883 A325884 * A325886 A325887 A325888

KEYWORD

nonn

AUTHOR

Felix Fröhlich, May 26 2019

STATUS

approved

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Last modified July 30 06:21 EDT 2021. Contains 346348 sequences. (Running on oeis4.)