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A020180 Pseudoprimes to base 52. 1
51, 85, 159, 265, 561, 671, 901, 1513, 1541, 1891, 2413, 2465, 2653, 2703, 2705, 3111, 3201, 3421, 4081, 4187, 4505, 5151, 6307, 6433, 6533, 6601, 6943, 7201, 8365, 8911, 9197, 9773, 9911, 10349, 10585, 11305, 12403, 13019, 13333, 14491, 15051, 15841 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 52^(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 = 52; 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: A050698 A039474 A253020 * A049328 A075894 A229274

Adjacent sequences:  A020177 A020178 A020179 * A020181 A020182 A020183

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified October 28 03:12 EDT 2021. Contains 348308 sequences. (Running on oeis4.)