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A020214 Pseudoprimes to base 86. 1
15, 51, 65, 85, 87, 145, 221, 255, 377, 435, 451, 493, 561, 595, 703, 1015, 1105, 1479, 1729, 1885, 1891, 2091, 2465, 2755, 2821, 2845, 3091, 3451, 4033, 5365, 5685, 6409, 6601, 7395, 7397, 7483, 7701, 8695, 8911, 9061, 9673, 10585, 10991, 11041, 11305 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 86^(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 = 86; 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: A278909 A194851 A075928 * A127643 A227129 A238574

Adjacent sequences:  A020211 A020212 A020213 * A020215 A020216 A020217

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified September 16 18:24 EDT 2019. Contains 327116 sequences. (Running on oeis4.)