| History of Cunningham Chain length 4 | |||
| Initial prime number | Digits | When | Discoverer |
|---|---|---|---|
| 1st kind | |||
| 93003628384 • 10111# − 1 | 4362 | 16 Feb 2025 | Serge Batalov, NewPGen, OpenPFGW |
| 158514759928 • 8501# − 1 | 3640 | 22 Oct 2023 | Frank Doornink, mtsieve, OpenPFGW |
| 13720852541 • 7877# − 1 | 3384 | 31 Oct 2016 | Michael Angel, Dirk Augustin, NewPGen, OpenPFGW |
| 28961560189 • 7517# − 1 | 3217 | 9 Sep 2016 | Michael Angel, Dirk Augustin, NewPGen, OpenPFGW |
| 375967981369 • 6907# − 1 | 2971 | 31 May 2017 | Oscar Östlin, NewPGen, OpenPFGW |
| 354362289656 • 6907# − 1 | 2971 | 31 May 2017 | Oscar Östlin, NewPGen, OpenPFGW |
| 285993323512 • 6907# − 1 | 2971 | 31 May 2017 | Oscar Östlin, NewPGen, OpenPFGW |
| 28904981097 • 6703# − 1 | 2882 | 20 Mar 2015 | Serge Batalov, NewPGen, OpenPFGW |
| 1249097877 • 6599# − 1 | 2835 | Feb 2011 | Michael Angel, NewPGen, OpenPFGW |
| 119184698 • 5501# − 1 | 2354 | Jun 2005 | Jiong Sun, NewPGen, OpenPFGW |
| 2554760770 • 3733# − 1 | 1605 | 2010 | Michael Angel, NewPGen, OpenPFGW |
| 1707223185 • 3049# − 1 | 1308 | Oct 2002 | Michael Angel, Dirk Augustin, Paul Jobling, NewPGen, OpenPFGW |
| 742155874 • 2381# − 1 | 1019 | Aug 2000 | Michael Angel, Dirk Augustin, Paul Jobling, NewPGen, OpenPFGW |
| 35443364 • 1013# − 1 | 429 | 10 Jun 2000 | Dirk Augustin, NewPGen, OpenPFGW |
| 2nd kind | |||
| 162229493368 • 11171# + 1 | 4809 | 17 Jul 2026 | Serge Batalov, NewPGen, OpenPFGW |
| 29313777201 • 10009# + 1 | 4318 | 11 Jul 2026 | Serge Batalov, NewPGen, OpenPFGW |
| 49325406476 • 9811# + 1 | 4233 | 10 Jul 2019 | Oscar Östlin, NewPGen, OpenPFGW |
| 259056632602 • 7699# + 1 | 3315 | 2 Jun 2019 | Serge Batalov, NewPGen, OpenPFGW |
| 17285145467 • 6977# + 1 | 3005 | 26 Jul 2016 | Michael Angel, Dirk Augustin, NewPGen, OpenPFGW |
| 35598436282 • 6701# + 1 | 2878 | 19 Mar 2015 | Serge Batalov, NewPGen, OpenPFGW |
| 96557970905 • 5303# + 1 | 2271 | 4 Aug 2019 | Ken Davis, Paul Underwood, NewPGen, PrimeForm_egroup, OpenPFGW |
| 86426205080 • 5303# + 1 | 2271 | 4 Aug 2019 | Ken Davis, Paul Underwood, NewPGen, PrimeForm_egroup, OpenPFGW |
| 66538965843 • 5303# + 1 | 2271 | 21 Apr 2019 | Ken Davis, Paul Underwood, NewPGen, PrimeForm_egroup, OpenPFGW |
| 62211382997 • 5303# + 1 | 2271 | 21 Apr 2019 | Ken Davis, Paul Underwood, NewPGen, PrimeForm_egroup, OpenPFGW |
| 60903543000 • 5303# + 1 | 2271 | 21 Apr 2019 | Ken Davis, Paul Underwood, NewPGen, PrimeForm_egroup, OpenPFGW |
| 630698711 • 4933# + 1 | 2105 | 2010 | Michael Angel, NewPGen, PrimeForm |
| 1453501013 • 4127# + 1 | 1770 | Mar 2005 | Jiong Sun, NewPGen, PrimeForm |
| 153344568 • 4001# + 1 | 1711 | Apr 2004 | Jiong Sun, NewPGen, PrimeForm |
| 131853904032 • 3061# + 1 | 1313 | Jan 2003 | David Broadhurst, PrimeForm |
| 356701232 • 3041# + 1 | 1303 | Sep 2002 | Michael Angel, Dirk Augustin, Paul Jobling, NewPGen, OpenPFGW |
| 92406026 • 1187# + 1 | 506 | 17 Jun 2000 | Dirk Augustin, NewPGen, OpenPFGW |
| 164285535 • 2972 + 1 | 301 | Jan 2000 | Dirk Augustin, Proth |
| 723592485 • 2770 + 1 | 241 | Oct 1999 | Dirk Augustin, Proth |