

A050259


Numbers n such that 2^n == 3 (mod n).


17




OFFSET

1,2


COMMENTS

No other terms below 1.1*10^16.
Terms were computed: a(2) by the Lehmers, a(3) by Max Alekseyev, a(4) and a(5) by Joe K. Crump, a(?) = 63130707451134435989380140059866138830623361447484274774099906755 by P.L. Montgomery.


REFERENCES

Mauldin, R. Daniel; Ulam, S. M.; Mathematical problems and games. Adv. in Appl. Math. 8 (1987), 281344. [From N. J. A. Sloane, Jul 30 2009]


LINKS

Table of n, a(n) for n=1..5.
Joe K. Crump, 2^n mod n
Eric Weisstein's World of Mathematics, 2
OEIS Wiki, 2^n mod n


CROSSREFS

Cf. A036236, A015940, A015910.
Sequence in context: A199631 A124977 A128172 * A249972 A233494 A175568
Adjacent sequences: A050256 A050257 A050258 * A050260 A050261 A050262


KEYWORD

nonn,more,hard


AUTHOR

Eric W. Weisstein


EXTENSIONS

a(1)a(5) certified by Max Alekseyev, Jan 27 2007, Apr 27 2009.


STATUS

approved



