%I #6 Mar 30 2012 18:34:55
%S 367,863,907,1327,1549,1579,1607,1619,1697,2221,2267,2551,2671,2677,
%T 2693,2719,2837,3209,3313,4049,4373,4391,4909,5261,5669,5693,6007,
%U 6269,6343,6547,6653,6703,6857,6907,7013,7559,7573,7583,7669,7723,7919
%N Primes p that have exactly two primitive roots that are not primitive roots mod p^2.
%C If x is a primitive root mod prime p then either x is a primitive root mod p^2 or x has order p-1 mod p^2.
%e 159 and 205 are primitive roots mod 367, but not mod 367^2.
%Y Cf. A060503, A055578, A060519, A060520.
%K nonn
%O 1,1
%A _Jud McCranie_, Mar 24 2001
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