| History of Cunningham Chain length 17 | |||
| Initial prime number | Digits | When | Discoverer |
|---|---|---|---|
| 1st kind | |||
| 2600776728061305571 • 41# / 31 − 1 | 32 | 12 May 2026 | Serge Batalov |
| 307515811472514430958669639 | 27 | 05 Mar 2026 | Nenad Mićić |
| 105654876135722435195160629 | 27 | 11 Mar 2026 | Nenad Mićić |
| 86336398942674769196995829 | 26 | 17 Mar 2026 | Nenad Mićić |
| 57362777810897416868009 | 23 | 06 Mar 2026 | Nenad Mićić |
| 4495582240592518042109 | 22 | 05 Mar 2026 | Nenad Mićić |
| 3153381329685017531099 | 22 | 05 Mar 2026 | Nenad Mićić |
| 2759832934171386593519 | 22 | 27 May 2008 | Jaroslaw Wroblewski |
| 2nd kind | |||
| 1540797425367761006138858881 | 28 | 3 Apr 2014 | Raanan Chermoni, Jaroslaw Wroblewski |
| 1316378195217623884408645441 | 28 | 9 Mar 2014 | Raanan Chermoni, Jaroslaw Wroblewski |
| 1284167734361435112645318721 | 28 | 3 Apr 2014 | Raanan Chermoni, Jaroslaw Wroblewski |
| 465463467291895470464386321 | 27 | 8 Mar 2014 | Raanan Chermoni, Jaroslaw Wroblewski |
| 1302312696655394336638441 | 25 | 10 Jun 2008 | Jaroslaw Wroblewski |
| 127806074555607670094731 | 24 | 5 Jun 2008 | Jaroslaw Wroblewski |
| 40244844789379926979141 | 23 | 5 Jun 2008 | Jaroslaw Wroblewski |
| 8058978143544782179441 | 22 | 2021 | John Armitage |