

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

Table of n, a(n) for n=1..10.


EXAMPLE

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


CROSSREFS

Cf. A060503, A055578, A060518, A060519.
Sequence in context: A145202 A188366 A255208 * A250701 A250158 A265737
Adjacent sequences: A060517 A060518 A060519 * A060521 A060522 A060523


KEYWORD

more,nonn


AUTHOR

Jud McCranie, Mar 24 2001


STATUS

approved



