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Record history of Cunningham Chain length 9
first member Digits When? Discoverer

1st kind
 
553374939996823808 • 593# - 1
260
10 Mar 2016
 Balyakin
40912747216912409971130368 • 401# - 1
190
17 Dec 2015
 Balyakin
2630705556345975695872 • 401# - 1
186
15 May 2015
 Balyakin
65728407627 • 431# - 1
185
Aug 2005
 Augustin, NewPGen, OpenPFGW
2093307780 • 127# - 1
58
Apr 2001
 Augustin, NewPGen, OpenPFGW

2nd kind
 
173129832252242394185728 • 401# + 1
187
15 May 2015
 Balyakin
182887101390961871050645934589918687746535370612015546956692154622371784133412186 • 223# + 1
167
23 Jul 2013
 Primecoin
326715355352350972893381745676353435171008659029059646631240926699147385033998869 • 193# + 1
158
9 Jul 2013
 Primecoin
745395266 • 211# + 1503602101
94
May 2004
 Alm, Andersen, Primo
1061169280 • 103# + 1
50
Dec 2000
 Augustin, NewPGen, OpenPFGW
43105142 • 73# + 1
37
Oct 2000
 Augustin, NewPGen, OpenPFGW