Record history of Cunningham Chain length 8

first member Digits When? Discoverer

1st kind
 
89628063633698570895360 ⋅ 593# - 1
265
17 Dec 2017
Balyakin
1106749879993647616 ⋅ 593# - 1
260
10 Mar 2016
Balyakin
5175268103676 ⋅ 557# - 1
238
20 Nov 2015
Östlin, NewPGen, OpenPFGW
2 ⋅ 65728407627 ⋅ 431# - 1
186
Aug 2005
Augustin, NewPGen, OpenPFGW
1352438530 ⋅ 311# + 5705699
135
May 2004
Alm, Andersen, Primo
548879116 ⋅ 181# - 1
82
Jun 2000
Augustin, NewPGen, OpenPFGW
1742368093 ⋅ 89# - 1
44
1 Jun 2000
Augustin, NewPGen, OpenPFGW
1360673835 ⋅ 250 - 1
25
Mar 2000
Augustin, NewPGen, Proth
36097525695 ⋅ 241 - 1
23
Dec 1999
Jobling

2nd kind
 
2373007846680317952 ⋅ 761# + 1
337
10 Mar 2016
Balyakin
112156947439087303442563072 ⋅ 491# + 1
230
15 May 2015
Balyakin
1148424905221 ⋅ 509# + 1
224
Aug 2010
Augustin, NewPGen, OpenPFGW
177497325593 ⋅ 229# + 1
103
Jun 2002
Augustin, NewPGen, OpenPFGW
1831430532 ⋅ 107# + 1
52
13 Jun 2000
Augustin, NewPGen, OpenPFGW