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A020221 Pseudoprimes to base 93. 1
4, 25, 28, 46, 92, 301, 322, 325, 425, 506, 532, 793, 805, 865, 874, 1081, 1105, 1393, 1525, 1645, 1729, 1771, 2047, 2071, 2425, 2465, 2737, 2926, 3781, 3913, 4033, 4187, 4325, 4465, 4945, 4996, 5071, 5149, 5185, 5405, 5593, 5713, 5833, 6601, 6697, 6721 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 93^(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 = 93; 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: A309056 A095970 A297963 * A042889 A042177 A302416

Adjacent sequences:  A020218 A020219 A020220 * A020222 A020223 A020224

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 25 02:01 EDT 2020. Contains 334581 sequences. (Running on oeis4.)