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A001916
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Primes p such that the congruence 2^x = 5 (mod p) is solvable.
(Formerly M4772 N2038)
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2
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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; internal format)
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OFFSET
| 1,1
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REFERENCES
| M. Kraitchik, Recherches sur la Th\'{e}orie 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).
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..1000
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MATHEMATICA
| Select[Prime[Range[120]], MemberQ[Table[Mod[2^x-5, #], {x, 0, #}], 0]&] (* From Jean-François Alcover, Aug 29 2011 *)
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CROSSREFS
| Cf. A001915.
Sequence in context: A020599 A167525 A038967 * A089151 A115669 A036956
Adjacent sequences: A001913 A001914 A001915 * A001917 A001918 A001919
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| Better description and more terms from David W. Wilson (davidwwilson(AT)comcast.net), Dec 12 2000. Description corrected by Joe K. Crump (joecr(AT)carolina.rr.com), Jan 17 2001.
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