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

Author

Martin Raab, Apr 20 2007

Keywords

• nonn

Examples

			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.
		

Links

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

Crossrefs

Cf. A001918, A060749.