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 A125000 Integers n such that 2^n == 19 (mod n). 9
 1, 17, 2873, 10081, 3345113, 420048673, 449349533, 2961432773, 19723772249, 821451792317, 1207046362769 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS No other terms below 10^15. Some larger terms: 500796684074966733196301. - Max Alekseyev, May 23 2012 LINKS Table of n, a(n) for n=1..11. MATHEMATICA m = 19; Join[Select[Range[m], Divisible[2^# - m, #] &], Select[Range[m + 1, 10^6], PowerMod[2, #, #] == m &]] (* Robert Price, Oct 08 2018 *) CROSSREFS Cf. A124974, A033981, A050259, A124977, A124965, A015911, A015910. Sequence in context: A092814 A198594 A138199 * A228195 A032909 A367536 Adjacent sequences: A124997 A124998 A124999 * A125001 A125002 A125003 KEYWORD nonn,more AUTHOR Zak Seidov, Nov 15 2006 EXTENSIONS Terms 1, 17 prepended by Max Alekseyev, May 20 2011 a(8)-a(11) from Max Alekseyev, May 23 2012 STATUS approved

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Last modified August 5 14:23 EDT 2024. Contains 374950 sequences. (Running on oeis4.)