A049485 Primes p such that p + 510510 is also prime, where 510510 is the 7th primorial number A002110(7).

19, 41, 43, 59, 71, 73, 79, 101, 103, 107, 109, 167, 173, 181, 197, 199, 241, 257, 263, 283, 293, 307, 313, 317, 337, 379, 397, 409, 421, 431, 433, 479, 491, 503, 509, 523, 547, 577, 599, 601, 613, 641, 643, 653, 659, 661, 683, 691, 701, 727, 733, 751, 769

Offset: 1

Author

Labos Elemer

Keywords

• nonn

Comments

p and p+510510 are not necessarily consecutive primes.

Examples

			19 is a term since it is prime and 19 + 510510 = 510529 is also prime.
		

Links

• Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A002110, A045320.

Cf. A001359, A023201, A049481, A049482, A049483, A049484, A154114.

Programs

Mathematica

lst={};Do[p=Prime[n];If[PrimeQ[p+510510],AppendTo[lst,p]],{n,6!}];lst (* Vladimir Joseph Stephan Orlovsky, Jan 04 2009 *)

PARI

isok(p) = isprime(p) && isprime(p + 510510); \\ Amiram Eldar, Mar 15 2025