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A105892 Primes for which -20 is a primitive root. +0
1
11, 13, 17, 31, 37, 53, 59, 73, 79, 113, 131, 137, 139, 157, 173, 179, 191, 199, 211, 233, 239, 257, 271, 277, 293, 313, 317, 331, 337, 353, 359, 379, 397, 419, 431, 433, 439, 479, 499, 557, 593, 599, 613, 631, 653, 659, 673, 677, 719, 751, 773, 797, 811, 839, 853, 857 (list; graph; listen)
OFFSET

1,1

MATHEMATICA

pr=-20; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &]

CROSSREFS

Sequence in context: A032621 A052031 A166009 this_sequence A111337 A162237 A090236

Adjacent sequences: A105889 A105890 A105891 this_sequence A105893 A105894 A105895

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Apr 24 2005

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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