A110027 Smallest primes starting a complete four iterations Cunningham chain of the first or second kind.

2, 1531, 6841, 15391, 44371, 53639, 53849, 57991, 61409, 66749, 83431, 105871, 143609, 145021, 150151, 167729, 186149, 199621, 206369, 209431, 212851, 231241, 242551, 268049, 291271, 296099, 319681, 340919, 346141, 377491, 381631, 422069

Offset: 1

Author

Alexandre Wajnberg, Sep 03 2005

Keywords

• easy
• nonn

Comments

The word "complete" indicates each chain is exactly 5 primes long (i.e., the chain cannot be a subchain of another one).

Terms computed by Gilles Sadowski.

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 A059764 and A110022 . [R. J. Mathar, May 08 2009]

Extensions

Edited and extended by R. J. Mathar, May 08 2009