A128895 Least positive primitive root that all of the first n primes share.

1, 5, 17, 17, 17, 227, 227, 5297, 5297, 5297, 226817, 1227497, 2270483, 5967617, 8617187, 27311693, 39928787, 39928787, 345664343, 345664343

Offset

1,2

Links

Don Reble, Table of n, a(n) for n = 1..37

Example

A primitive root of 2 must be == 1 (mod 2); for 3, it must be == 2 (mod 3), and for 5 it must be == 2 or 3 (mod 5). The smallest such number is 17, so a(3)=17.

Crossrefs

Cf. A001918, A060749.

Sequence in context: A303804 A304851 A237437 * A141558 A304217 A305248

Adjacent sequences: A128892 A128893 A128894 * A128896 A128897 A128898

Keyword

nonn

Author

Martin Raab, Apr 20 2007

Status

approved