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A124111 Primes with record large values of the second smallest positive primitive root. 0
5, 7, 11, 23, 31, 191, 409, 1151, 2161, 2689, 3361, 4729, 9601, 14281, 23209, 31249, 33049, 55441, 71761, 110881, 2116921, 3384481, 5109721, 222855361, 288940681, 567719161, 831143041, 899978641 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Sequence begins at the first prime with at least 2 primitive roots, namely 5.

LINKS

Table of n, a(n) for n=1..28.

EXAMPLE

The smallest two positive primitive roots of a(26)=567719161 are 43 and 172. No integer less than 567719161 has a second root greater than or equal to 172.

CROSSREFS

Cf. A002230.

Sequence in context: A174332 A248595 A266233 * A151715 A226027 A090810

Adjacent sequences:  A124108 A124109 A124110 * A124112 A124113 A124114

KEYWORD

nonn

AUTHOR

Ken Takusagawa, Nov 27 2006

STATUS

approved

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Last modified November 22 13:47 EST 2019. Contains 329393 sequences. (Running on oeis4.)