Smallest Cunningham chains of a given length. Numbers in red indicate smallest known, as opposed to smallest, and numbers in bold are those I have found personally.
See Dirk Augustin's Cunningham chain page for more Cunningham chain records — previously known chains taken from there.
|Length||Type||First prime in chain||Digits||Found by|
|2nd||42008163485623434922152331||26||Chermoni and Wroblewski, March 2014|
|18||1st||776208125345634679522109||24||Armitage, January 2021|
|2nd||773377687199227745520601||24||Armitage, January 2021|
|17||1st||2759832934171386593519||22||Wroblewski, May 2008*|
|2nd||8058978143544782179441||22||Armitage, January 2021|
* Proved smallest by Sorenson and Webster, Two algorithms to find primes in patterns, Section 4.3 (arXiv).