

A073102


Primes of the form 210n + 1.


20



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
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..38.


EXAMPLE

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


MATHEMATICA

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


PROG

(MAGMA) [ a: n in [0..400]  IsPrime(a) where a is 210*n+1] // Vincenzo Librandi, Aug 08 2010
(PARI) select(x>((x % 210)==1), primes(3000)) \\ Michel Marcus, Jan 14 2018


CROSSREFS

Subsequence of A142076, A124826, and A132230.
Cf. A073085.
Sequence in context: A147156 A140535 A258332 * A076167 A217620 A289993
Adjacent sequences: A073099 A073100 A073101 * A073103 A073104 A073105


KEYWORD

easy,nonn


AUTHOR

Zak Seidov Aug 24 2002


EXTENSIONS

Extended by Ray Chandler, Apr 29 2010


STATUS

approved



