A073102 Primes of the form 210n + 1.

211, 421, 631, 1051, 1471, 2311, 2521, 2731, 3361, 3571, 4201, 4621, 4831, 5881, 6091, 6301, 7351, 7561, 8191, 8821, 9241, 9661, 9871, 10501, 10711, 11131, 11551, 11971, 12391, 12601, 13441, 14071, 14281, 15121, 15331, 15541, 16381, 17011

Offset: 1

Author

Zak Seidov Aug 24 2002

Keywords

• easy
• nonn

Examples

			211 = 210*1 + 1 is prime; 1471 = 210*7 + 1 is prime.
		

Crossrefs

Subsequence of A142076, A124826, and A132230.

Cf. A073085.

Programs

Magma

[ a: n in [0..400] | IsPrime(a) where a is 210*n+1]; // Vincenzo Librandi, Aug 08 2010

Mathematica

210*Flatten[Position[PrimeQ[210Range[100]+1], True]]+1
Select[1+210Range[100],PrimeQ] (* Ray Chandler, Apr 29 2010 *)

PARI

select(x->((x % 210)==1), primes(3000)) \\ Michel Marcus, Jan 14 2018

Extensions

Extended by Ray Chandler, Apr 29 2010