A110025 Smallest primes starting a complete three iterations Cunningham chain of the first or second kind.

509, 1229, 1409, 2131, 2311, 2699, 3539, 6211, 6449, 7411, 10321, 10589, 11549, 11909, 12119, 17159, 18121, 19709, 19889, 22349, 22531, 23011, 24391, 26189, 27479, 29671, 30389, 31771, 35311, 41491, 43649, 46411, 54601, 55229, 56311

Offset: 1

Author

Alexandre Wajnberg, Sep 03 2005

Keywords

• easy
• nonn

Comments

Terms computed by Gilles Sadowski.

Examples

			1409 is here because, through the operator <2p+1> for chains of the first kind, 1409 -> 2819 -> 5639 -> 11279 and the chain ends here.
2131 is here because, through the operator <2p-1> for chains of the second kind, 2131 -> 4261 -> 8521 -> 17041 and the chain ends here.
		

Links

• Chris Caldwell's Prime Glossary, Cunningham chains.

Crossrefs

Cf. A023272, A023302, A023330, A005384, A005385, A059452, A059455, A007700.

Cf. A059759, A059760, A059761, A059762, A059763, A059764, A059765, A038397, A104349, A091314, A069362, A016093, A014937, A057326.

Formula

Union of A059763 and A110024. [R. J. Mathar, May 08 2009]

Extensions

Edited by R. J. Mathar, May 08 2009