| History of Cunningham Chain length 9 | |||
| Initial prime number | Digits | When | Discoverer |
|---|---|---|---|
| 1st kind | |||
| 553374939996823808 • 593# − 1 | 260 | 10 Mar 2016 | Andrey Balyakin |
| 40912747216912409971130368 • 401# − 1 | 190 | 17 Dec 2015 | Andrey Balyakin |
| 2630705556345975695872 • 401# − 1 | 186 | 15 May 2015 | Andrey Balyakin |
| 65728407627 • 431# − 1 | 185 | Aug 2005 | Dirk Augustin, NewPGen, OpenPFGW |
| 2093307780 • 127# − 1 | 58 | Apr 2001 | Dirk Augustin, NewPGen, OpenPFGW |
| 2nd kind | |||
| 316094278095659 • 479# + 1 | 213 | 09 Apr 2026 | Serge Batalov |
| 173129832252242394185728 • 401# + 1 | 187 | 15 May 2015 | Andrey Balyakin |
| 182887101390961871050645934589918687746535370612015546956692154622371784133412186 • 223# + 1 | 167 | 23 Jul 2013 | Primecoin |
| 68639090551530 • 367# + 1 | 162 | 6 Nov 2022 | Dirk Augustin |
| 326715355352350972893381745676353435171008659029059646631240926699147385033998869 • 193# + 1 | 158 | 9 Jul 2013 | Primecoin |
| 745395266 • 211# + 1503602101 | 94 | May 2004 | Torbjörn Alm, Jens Kruse Andersen, Primo |
| 1061169280 • 103# + 1 | 50 | Dec 2000 | Dirk Augustin, NewPGen, OpenPFGW |
| 43105142 • 73# + 1 | 37 | Oct 2000 | Dirk Augustin, NewPGen, OpenPFGW |