A061333 Primes with 21 as smallest positive primitive root.

409, 4441, 12841, 15889, 22751, 30091, 41809, 55921, 60889, 77167, 82183, 99823, 103561, 110281, 120391, 127249, 136471, 139201, 155671, 157351, 161881, 164209, 180361, 180799, 182839, 183823, 187711, 191047, 230929, 250423, 257263, 272191

Offset: 1

Author

Klaus Brockhaus, Apr 25 2001

Keywords

• nonn

Links

• T. D. Noe, Table of n, a(n) for n=1..1000

Crossrefs

Cf. A001918, A001126, A019348.

Programs

Mathematica

Prime[ Select[ Range[24000], PrimitiveRoot[ Prime[ # ] ] == 21 & ] ]
(* or *)
Select[ Prime@Range@24000, PrimitiveRoot@# == 21 &] (* Robert G. Wilson v, May 11 2001 *)