A128895 - OEIS

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

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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