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A020187 Pseudoprimes to base 59. 1
15, 58, 87, 145, 435, 451, 561, 645, 946, 1015, 1105, 1141, 1247, 1541, 1661, 1729, 1885, 1991, 2413, 2465, 2755, 2821, 3097, 4215, 4681, 4795, 5365, 5611, 5729, 6191, 6409, 6533, 6601, 7421, 8149, 8321, 8705, 8911, 9637, 10081, 10217, 10585, 11041 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 59^(n-1) == 1 (mod n).

LINKS

R. J. Mathar, Table of n, a(n) for n=1..1137

Index entries for sequences related to pseudoprimes

MATHEMATICA

base = 59; 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 *)

Select[Range[12000], !PrimeQ[#]&&PowerMod[59, #-1, #]==1&] (* Harvey P. Dale, Oct 02 2012 *)

CROSSREFS

Cf. A001567 (pseudoprimes to base 2).

Sequence in context: A261419 A183942 A012691 * A261798 A022287 A223344

Adjacent sequences:  A020184 A020185 A020186 * A020188 A020189 A020190

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified April 25 19:05 EDT 2017. Contains 285426 sequences.