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A105881
Primes for which -9 is a primitive root.
3
2, 7, 11, 19, 23, 31, 43, 47, 59, 71, 79, 83, 107, 127, 131, 139, 163, 167, 179, 191, 199, 211, 223, 227, 239, 251, 263, 283, 311, 331, 347, 359, 379, 383, 419, 443, 463, 467, 479, 487, 503, 563, 571, 587, 599, 607, 631, 647, 659, 691, 719, 739, 743, 751, 811, 823, 827
OFFSET
1,1
MATHEMATICA
pr=-9; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &]
CROSSREFS
Sequence in context: A289994 A040154 A166862 * A060191 A178899 A023393
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 24 2005
STATUS
approved