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A049485 Both p and p+510510 are primes, where 510510 is the 7th primorial number A002110(7). 4
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 (list; graph; refs; listen; history; text; internal format)
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 * A019393 A179849 A029489

Adjacent sequences:  A049482 A049483 A049484 * A049486 A049487 A049488

KEYWORD

nonn

AUTHOR

Labos Elemer

STATUS

approved

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Last modified September 22 17:39 EDT 2021. Contains 347607 sequences. (Running on oeis4.)