| History of Cunningham Chain length 8 | |||
| Initial prime number | Digits | When | Discoverer |
|---|---|---|---|
| 1st kind | |||
| 72368211643254 • 727# − 1 | 315 | 11 Apr 2026 | Serge Batalov |
| 89628063633698570895360 • 593# − 1 | 265 | 17 Dec 2017 | Andrey Balyakin |
| 1106749879993647616 • 593# − 1 | 260 | 10 Mar 2016 | Andrey Balyakin |
| 5175268103676 • 557# − 1 | 238 | 20 Nov 2015 | Oscar Östlin, NewPGen, OpenPFGW |
| 131456815254 • 431# − 1 | 186 | Aug 2005 | Dirk Augustin, NewPGen, OpenPFGW |
| 1352438530 • 311# + 5705699 | 135 | May 2004 | Torbjörn Alm, Jens Kruse Andersen, Primo |
| 548879116 • 181# − 1 | 82 | Jun 2000 | Dirk Augustin, NewPGen, OpenPFGW |
| 1742368093 • 89# − 1 | 44 | 1 Jun 2000 | Dirk Augustin, NewPGen, OpenPFGW |
| 1360673835 • 250 − 1 | 25 | Mar 2000 | Dirk Augustin, NewPGen, Proth |
| 36097525695 • 241 − 1 | 23 | Dec 1999 | Paul Jobling |
| 2nd kind | |||
| 2373007846680317952 • 761# + 1 | 337 | 10 Mar 2016 | Andrey Balyakin |
| 112156947439087303442563072 • 491# + 1 | 230 | 15 May 2015 | Andrey Balyakin |
| 1148424905221 • 509# + 1 | 224 | Aug 2010 | Dirk Augustin, NewPGen, OpenPFGW |
| 177497325593 • 229# + 1 | 103 | Jun 2002 | Dirk Augustin, NewPGen, OpenPFGW |
| 1831430532 • 107# + 1 | 52 | 13 Jun 2000 | Dirk Augustin, NewPGen, OpenPFGW |