A124974 Integers n such that 2^n == 17 (mod n).

1, 3, 5, 9, 45, 99, 53559, 1143357, 2027985, 36806085, 1773607905, 3314574181, 1045463125509, 1226640523999, 3567404505159, 28726885591099, 39880799734039, 87977068273719, 106436400721299, 339966033494859, 999567363539883

Offset

1,2

Comments

Some larger terms: 576541379659648320485

Links

Table of n, a(n) for n=1..21.

Example

2^45 = 17 + 45*781874935307,
2^99 = 17 + 99*6402275758728431320690420229.

Mathematica

m = 17; Join[Select[Range[m], Divisible[2^# - m, #] &],
Select[Range[m + 1, 10^6], PowerMod[2, #, #] == m &]] (* Robert Price, Oct 08 2018 *)

Crossrefs

Cf. A033981, A124965, A015911.

Sequence in context: A082703 A125708 A055289 * A336144 A215440 A163550

Adjacent sequences: A124971 A124972 A124973 * A124975 A124976 A124977

Keyword

nonn

Author

Zak Seidov, Nov 14 2006

Extensions

Terms 1, 3, 5, 9 prepended by Max Alekseyev, May 20 2011

a(11)-a(21) from Max Alekseyev, May 25 2012

Status

approved