%I #9 Mar 31 2024 15:03:32
%S 2,7,11,19,23,31,43,47,59,71,79,83,107,127,131,139,163,167,179,191,
%T 199,211,223,227,239,251,263,283,311,331,347,359,379,383,419,443,463,
%U 467,479,487,503,563,571,587,599,607,631,647,659,691,719,739,743,751,811,823,827
%N Primes for which -9 is a primitive root.
%H Vincenzo Librandi, <a href="/A105881/b105881.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=-9; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &]
%K nonn
%O 1,1
%A _N. J. A. Sloane_, Apr 24 2005
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