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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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 19 10:32 EDT 2019. Contains 324219 sequences. (Running on oeis4.)