A049485 Both p and p+510510 are primes, 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

1,1

Comments

p and p+510510 are not necessarily consecutive primes.

Links

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

Example

Both 19 and 19 + 2*3*5*7*11*13*17 = 510529 are prime.

Mathematica

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

Crossrefs

Cf. A045320, A001359, A023201, A002110, A049481, A049482, A049483, A049484, A049485, A154114.

Sequence in context: A065349 A085778 A090265 * A356471 A019393 A179849

Adjacent sequences: A049482 A049483 A049484 * A049486 A049487 A049488

Keyword

nonn

Author

Labos Elemer

Status

approved