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A020194 Pseudoprimes to base 66. 1
65, 91, 335, 469, 481, 871, 1105, 1271, 1541, 1729, 1891, 2071, 2201, 2465, 2821, 2911, 3145, 4033, 4291, 4355, 4681, 5461, 5551, 6097, 6601, 6953, 7969, 8911, 9211, 9919, 10585, 11305, 11647, 13019, 13741, 15211, 15841, 17353, 19345, 19757, 20591, 21785 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 66^(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 = 66; 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: A280755 A020140 A283656 * A094447 A020224 A063519

Adjacent sequences:  A020191 A020192 A020193 * A020195 A020196 A020197

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 26 13:17 EDT 2022. Contains 354092 sequences. (Running on oeis4.)