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