login
A015940
Positive integers n such that 2^n == -3 (mod n).
8
1, 5, 917, 3223, 62911, 326329, 395819, 33504053, 4446226763, 17556128765, 141613728437, 5259417592253, 113837290408523
OFFSET
1,2
COMMENTS
No other terms below 10^16.
Larger term: 18468744643735483963902321985787. - Max Alekseyev, Aug 01 2011
MATHEMATICA
Do[ If[ PowerMod[ 2, n, n ] + 3 == n, Print[n]], { n, 1, 10^9, 2 } ]
CROSSREFS
Cf. A050259.
Sequence in context: A094630 A284637 A173914 * A093853 A195627 A318066
KEYWORD
nonn,more
EXTENSIONS
Corrected and extended by Olivier Wittenberg, May 23 2004.
a(10)-a(13) from Max Alekseyev, Aug 01 2011
STATUS
approved