%I #15 Mar 31 2014 05:51:46
%S 3,11,13,29,37,53,59,67,83,101,107,109,131,139,149,163,173,179,181,
%T 197,227,229,269,277,283,293,307,317,331,347,349,379,389,397,419,421,
%U 443,461,467,491,499,509,547,557,563,587,613,653,677,683,701,773,797,827,829,853
%N Primes with primitive root 50.
%H Vincenzo Librandi, <a href="/A019374/b019374.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=50; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &]
%K nonn
%O 1,1
%A _David W. Wilson_