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A128124 Numbers k such that 2^k == 12 (mod k). 10
1, 2, 4, 5, 3763, 125714, 167716, 1803962, 2895548, 4031785, 36226466, 16207566916, 103742264732, 29000474325364, 51053256144532, 219291270961199, 1611547934753332, 5816826177630619 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Joe K. Crump, 2^n mod n
OEIS Wiki, 2^n mod n
MATHEMATICA
m = 12; Join[Select[Range[m], Divisible[2^# - m, #] &],
Select[Range[m + 1, 10^6], PowerMod[2, #, #] == m &]] (* Robert Price, Oct 08 2018 *)
CROSSREFS
Sequence in context: A242915 A066684 A328784 * A182687 A141062 A131806
KEYWORD
hard,more,nonn
AUTHOR
Alexander Adamchuk, Feb 15 2007
EXTENSIONS
More terms from Ryan Propper, Mar 23 2007
1, 2, 4 and 5 added by N. J. A. Sloane, Apr 23 2007
a(13)-a(15) from Max Alekseyev, May 19 2011
a(15) corrected, a(16)-a(18) added by Max Alekseyev, Oct 02 2016
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)