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 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS No other terms below 10^16. Larger term: 18468744643735483963902321985787. - Max Alekseyev, Aug 01 2011 LINKS OEIS Wiki, 2^n mod n 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 Adjacent sequences:  A015937 A015938 A015939 * A015941 A015942 A015943 KEYWORD nonn,more AUTHOR EXTENSIONS Corrected and extended by Olivier Wittenberg, May 23 2004. a(10)-a(13) from Max Alekseyev, Aug 01 2011 STATUS approved

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Last modified November 26 11:47 EST 2022. Contains 358359 sequences. (Running on oeis4.)