A051654 Primes p such that 30030*p + 1 is also prime.

5, 11, 13, 29, 31, 41, 47, 61, 67, 79, 89, 127, 139, 149, 179, 181, 191, 197, 269, 307, 337, 347, 367, 383, 421, 467, 487, 541, 547, 569, 613, 641, 727, 809, 811, 821, 823, 883, 887, 941, 1031, 1033, 1087, 1093, 1103, 1117, 1193, 1201, 1237, 1259, 1279, 1283

Offset

1,1

Links

Michael De Vlieger, Table of n, a(n) for n = 1..10000

Example

p = 5 and 30030*p + 1 = 150151 are both primes.

Mathematica

Select[Prime@ Range@ 210, PrimeQ[30030 # + 1] &] (* Michael De Vlieger, Aug 15 2017 *)

Prog

(PARI) isok(p) = isprime(p) && isprime(30030*p+1); \\ Michel Marcus, Dec 19 2013
(Magma) [p: p in PrimesUpTo (1300) | IsPrime(30030*p+1)]; // Vincenzo Librandi, Aug 16 2017

Crossrefs

Cf. A005384, A002110, A005385.

Sequence in context: A161540 A153120 A115782 * A225754 A098973 A125742

Adjacent sequences: A051651 A051652 A051653 * A051655 A051656 A051657

Keyword

nonn

Author

Labos Elemer

Extensions

More terms from Michel Marcus, Dec 19 2013

Status

approved