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A155886 Least k such that 2^(2^k) = n (mod k). 1
1, 3, 14, 11, 6, 1941491, 10, 83, 31, 13, 123, 35, 71, 27, 34913, 241, 18, 8059, 34, 349, 44, 25, 39, 100867561, 76, 231, 253, 66203, 57, 227, 139, 45, 184, 37, 111, 97, 55, 41, 103, 1099, 81, 66791, 53 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

First occurrence of n in sequence A155836.

LINKS

Table of n, a(n) for n=0..42.

CROSSREFS

A015910 (2^n mod n), A036236

Sequence in context: A320261 A187772 A291796 * A319456 A222713 A138959

Adjacent sequences:  A155883 A155884 A155885 * A155887 A155888 A155889

KEYWORD

nonn

AUTHOR

T. D. Noe, Jan 29 2009

STATUS

approved

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Last modified May 9 13:33 EDT 2021. Contains 343742 sequences. (Running on oeis4.)