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 A001916 Primes p such that the congruence 2^x = 5 (mod p) is solvable. (Formerly M4772 N2038) 2
 2, 3, 11, 13, 19, 29, 37, 41, 53, 59, 61, 67, 71, 79, 83, 101, 107, 131, 139, 149, 163, 173, 179, 181, 191, 197, 199, 211, 227, 239, 251, 269, 271, 293, 311, 317, 347, 349, 359, 373, 379, 389, 401, 409, 419, 421, 443, 449, 461, 467, 479, 491, 509, 521, 523, 541, 547, 557 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES M. Kraitchik, Recherches sur la Théorie des Nombres. Gauthiers-Villars, Paris, Vol. 1, 1924, Vol. 2, 1929, see Vol. 1, p. 64. N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence). N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS T. D. Noe, Table of n, a(n) for n = 1..1000 MATHEMATICA Select[Prime[Range[120]], MemberQ[Table[Mod[2^x-5, #], {x, 0, #}], 0]&] (* Jean-François Alcover, Aug 29 2011 *) CROSSREFS Cf. A001915. Sequence in context: A020599 A167525 A038967 * A089151 A115669 A036956 Adjacent sequences:  A001913 A001914 A001915 * A001917 A001918 A001919 KEYWORD nonn AUTHOR EXTENSIONS Better description and more terms from David W. Wilson, Dec 12 2000 Description corrected by Joe K. Crump (joecr(AT)carolina.rr.com), Jan 17 2001 STATUS approved

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Last modified October 15 00:14 EDT 2019. Contains 328025 sequences. (Running on oeis4.)