A105893 - OEIS

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A105893

Primes for which -21 is a primitive root.

2, 29, 47, 53, 59, 67, 83, 97, 113, 127, 131, 137, 149, 151, 157, 167, 181, 197, 227, 233, 251, 281, 311, 313, 317, 331, 379, 383, 389, 397, 401, 409, 419, 449, 467, 479, 487, 499, 503, 557, 563, 569, 571, 577, 587, 647, 653, 701, 719, 733, 739, 751, 769, 809, 821, 823

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Index entries for primes by primitive root

MATHEMATICA

pr=-21; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &]

CROSSREFS

Sequence in context: A252892 A256472 A330895 * A366692 A059799 A367796

Adjacent sequences: A105890 A105891 A105892 * A105894 A105895 A105896

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Apr 24 2005

STATUS

approved