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A060520
Primes p that have at least four primitive roots that are not primitive roots mod p^2.
2
653, 16631, 40487, 50033, 52517, 67631, 80803, 138107, 145253, 147197
OFFSET
1,1
COMMENTS
40487 is unusual - it has four primitive roots with this property (5, 5^3, 5^5, 4492) and 5 is the least positive primitive root mod 40487 - see A055578.
EXAMPLE
13425, 18243, 34196, 38462, 39362 and 51787 are primitive roots mod 52517, but not mod 52517^2.
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Jud McCranie, Mar 24 2001
STATUS
approved