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A211244 Order of 8 mod n-th prime: least k such that prime(n) divides 8^k-1. 6
0, 2, 4, 1, 10, 4, 8, 6, 11, 28, 5, 12, 20, 14, 23, 52, 58, 20, 22, 35, 3, 13, 82, 11, 16, 100, 17, 106, 12, 28, 7, 130, 68, 46, 148, 5, 52, 54, 83, 172, 178, 60, 95, 32, 196, 33, 70, 37, 226, 76, 29, 119, 8, 50, 16, 131, 268, 45, 92, 70, 94, 292, 34, 155, 52 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

MATHEMATICA

nn = 8; Table[If[Mod[nn, p] == 0, 0, MultiplicativeOrder[nn, p]], {p, Prime[Range[100]]}]

PROG

(GAP) A000040:=Filtered([1..350], IsPrime);;

List([1..Length(A000040)], n->OrderMod(8, A000040[n])); # Muniru A Asiru, Feb 06 2019

CROSSREFS

Cf. A014664, A062117, A082654, A211241, A211242, A211243, A211245, A002371.

Sequence in context: A208936 A102405 A271206 * A228337 A114506 A114848

Adjacent sequences:  A211241 A211242 A211243 * A211245 A211246 A211247

KEYWORD

nonn

AUTHOR

T. D. Noe, Apr 11 2012

STATUS

approved

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Last modified January 23 22:16 EST 2020. Contains 331177 sequences. (Running on oeis4.)