A105885 - OEIS

A105885

Primes for which -13 is a primitive root.

2, 3, 5, 23, 37, 41, 43, 73, 79, 89, 97, 107, 109, 127, 131, 137, 139, 149, 179, 191, 197, 199, 241, 251, 263, 281, 283, 293, 317, 347, 349, 353, 367, 397, 401, 439, 449, 457, 467, 491, 503, 509, 523, 541, 557, 563, 571, 577, 593, 599, 607, 613, 617, 647, 659, 719, 727

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

OFFSET

1,1

COMMENTS

Primes p such that Legendre(-13,p) = -1. - N. J. A. Sloane, Dec 26 2017

LINKS

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

Index entries for primes by primitive root

MAPLE

Load the Maple program HH given in A296920. Then run HH(-13, 200); This produces A296926, A296927, A296928, A105885. - N. J. A. Sloane, Dec 26 2017

MATHEMATICA

pr=-13; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &]