%I #9 Mar 31 2024 15:03:16

%S 2,11,17,19,37,53,59,73,79,97,113,131,137,139,151,157,173,179,193,197,

%T 233,239,257,277,293,311,317,331,353,359,373,397,419,431,433,439,479,

%U 491,499,557,571,577,593,599,613,617,619,653,659,673,677,719,751,757,773,797,811

%N Primes for which -5 is a primitive root.

%H Vincenzo Librandi, <a href="/A105877/b105877.txt">Table of n, a(n) for n = 1..1000</a>

%H <a href="/index/Pri#primes_root">Index entries for primes by primitive root</a>

%t pr=-5; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &]

%K nonn

%O 1,1

%A _N. J. A. Sloane_, Apr 24 2005