A087832 Numbers k such that k*primorial(2473)-1 is prime.

131, 167, 215, 252, 393, 559, 616, 646, 819, 860, 875, 888, 1323, 1364, 1393, 1435, 1523, 1598, 1669, 1734, 1891, 1924, 1951, 2236, 2576, 2761, 2848, 2887, 3138, 3221, 4455, 4540, 4592, 4812, 4818, 5002, 5165, 5188, 5227, 5237, 5306, 5314, 5453, 5540, 5621, 5702

Offset: 1

Author

Pierre CAMI, Oct 07 2003

Keywords

• nonn

Comments

The "2473" sequence has rather many terms below 2473.

Crossrefs

Cf. A002110, A087730, A087832.

Programs

PARI

N=prod(n=1,366,prime(n));for(k=1,1e5,if(ispseudoprime(k*N-1),print1(k", "))) \\ Charles R Greathouse IV, Dec 28 2011

Formula

a(n) ~ c * n log n with c = 0.07162.... [Charles R Greathouse IV, Dec 28 2011]

Extensions

Edited by Don Reble, Nov 09 2005

a(25)-a(46) from Charles R Greathouse IV, Dec 28 2011