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%I #19 Sep 23 2018 11:37:06
%S 11,23,41,43,47,59,61,79,89,109,131,151,167,173,179,193,197,199,251,
%T 263,281,293,307,317,349,383,419,421,433,439,449,457,491,503,521,523,
%U 541,557,569,577,641,647,653,659,673,677,743,751,761,773,787,797,809,829,863,881
%N Primes with primitive root 30.
%H Vincenzo Librandi, <a href="/A019356/b019356.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 Select[Prime[Range[200]], MultiplicativeOrder[30, #] == # - 1 &]
%t Join[{11,23},Select[Prime[Range[200]],PrimitiveRoot[#,30]==30&]] (* _Harvey P. Dale_, Sep 23 2018 *)
%K nonn,easy
%O 1,1
%A _David W. Wilson_
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