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A020227 Pseudoprimes to base 99. 1
14, 25, 35, 49, 65, 98, 145, 169, 175, 217, 245, 325, 361, 377, 637, 703, 725, 742, 775, 833, 845, 1105, 1225, 1421, 1519, 1729, 1834, 1885, 2191, 2198, 2413, 2465, 2821, 3185, 3277, 3565, 4069, 4123, 4225, 4699, 4753, 4795, 4901, 5365, 5425, 5611, 6601 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 99^(n-1) == 1 (mod n).

LINKS

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

Index entries for sequences related to pseudoprimes

MATHEMATICA

base = 99; 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[7000], CompositeQ[#]&&PowerMod[99, #-1, #]==1&] (* Harvey P. Dale, Jul 16 2015 *)

CROSSREFS

Cf. A001567 (pseudoprimes to base 2).

Sequence in context: A154038 A061923 A031075 * A032608 A164403 A164398

Adjacent sequences:  A020224 A020225 A020226 * A020228 A020229 A020230

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified October 16 18:03 EDT 2019. Contains 328102 sequences. (Running on oeis4.)