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A020186 Pseudoprimes to base 58. 1
57, 133, 177, 285, 341, 561, 671, 703, 885, 1105, 1121, 1141, 1441, 1541, 1729, 1891, 2065, 2821, 3009, 3097, 3165, 3363, 3365, 3781, 4061, 4071, 4371, 5605, 6031, 6601, 7363, 7471, 7991, 8119, 8321, 8749, 8911, 9073, 11441, 11859, 12027, 12331, 12403 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 58^(n-1) == 1 (mod n). - Michel Lagneau, Feb 18 2012

LINKS

T. D. Noe, Table of n, a(n) for n = 1..1000

Index entries for sequences related to pseudoprimes

MATHEMATICA

base = 58; t = {}; n = 1; While[Length[t] < 100, n++; If[! PrimeQ[n] && PowerMod[base, n-1, n] == 1, AppendTo[t, n]]]; t (* T. D. Noe, Feb 21 2012 *)

CROSSREFS

Cf. A001567 (pseudoprimes to base 2).

Sequence in context: A240759 A154092 A118152 * A063316 A020284 A140367

Adjacent sequences:  A020183 A020184 A020185 * A020187 A020188 A020189

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified August 9 01:35 EDT 2020. Contains 336310 sequences. (Running on oeis4.)