A015929 Positive integers n such that 2^n == 2^8 (mod n).

1, 2, 4, 6, 8, 12, 14, 16, 20, 24, 32, 40, 48, 56, 60, 64, 80, 88, 96, 104, 120, 127, 128, 136, 140, 152, 160, 184, 192, 224, 232, 240, 248, 256, 260, 272, 296, 308, 320, 328, 344, 376, 384, 408, 416, 424, 472, 480

Offset: 1

Author

Robert G. Wilson v

Keywords

• nonn

Comments

The odd terms are given by A215611.

For all m, 2^A051447(m)-1 belongs to this sequence.

Links

• T. D. Noe, Table of n, a(n) for n = 1..1000
• OEIS Wiki, 2^n mod n

Crossrefs

Contains A208156 as a subsequence.

Cf. A015919, A015921, A015922, A015924, A015925, A015926, A015927, A015931, A015932, A015935, A015937.

Programs

Mathematica

Select[Range[1000], Mod[2^# - 2^8, #] == 0 &] (* T. D. Noe, Aug 17 2012 *)

Extensions

Edited by Max Alekseyev, Jul 30 2011