A096393 Least primitive root of n-th Mersenne prime.

2, 3, 3, 3, 17, 3, 3, 7, 37, 3, 3, 43, 3, 5, 5, 3, 3, 23, 3, 7

Offset

1,1

Links

Table of n, a(n) for n=1..20.

Joerg Arndt, Matters Computational (The Fxtbook)

GIMPS, Great Internet Mersenne Prime Search

S. S. Wagstaff, Jr., The Cunningham Project

Example

a(5)=17 because 17 is the least primitive root of the 5th Mersenne prime, 8191.

Crossrefs

Cf. A000668, A000043.

Sequence in context: A210483 A022296 A013069 * A010120 A012887 A177876

Adjacent sequences: A096390 A096391 A096392 * A096394 A096395 A096396

Keyword

hard,more,nonn

Author

Ken Takusagawa, Aug 05 2004

Extensions

a(16), a(18)-a(20) from Max Alekseyev, Feb 07 2024

Status

approved