

A060520


Primes p that have at least four primitive roots that are not primitive roots mod p^2.


2




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.


LINKS



EXAMPLE

13425, 18243, 34196, 38462, 39362 and 51787 are primitive roots mod 52517, but not mod 52517^2.


CROSSREFS



KEYWORD

more,nonn


AUTHOR



STATUS

approved



