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A020207 Pseudoprimes to base 79. 1
6, 15, 26, 39, 49, 65, 78, 91, 195, 301, 559, 561, 637, 1105, 1649, 1729, 2107, 2465, 2626, 2665, 2701, 2821, 3201, 3913, 4215, 4753, 5055, 6305, 6533, 6601, 7051, 7107, 7361, 7543, 8149, 8321, 8911, 9331, 9773, 9881, 10585, 10621, 12001, 14491, 14689 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Composite numbers n such that 79^(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 = 79; 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[15000], CompositeQ[#]&&PowerMod[79, #-1, #]==1&] (* Harvey P. Dale, Feb 15 2015 *)

CROSSREFS

Cf. A001567 (pseudoprimes to base 2).

Sequence in context: A064565 A190515 A051940 * A222170 A151762 A213791

Adjacent sequences:  A020204 A020205 A020206 * A020208 A020209 A020210

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified May 25 19:30 EDT 2020. Contains 334595 sequences. (Running on oeis4.)