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Record history of Cunningham Chain length 16
first member Digits When? Discoverer

1st kind
 
91304653283578934559359
23
29 May 2008
 Wroblewski
5519665868342773187038
22
27 May 2008
 Wroblewski
892390227741617675069
21
Feb 2002
 Carmody, Jobling, GenSv

2nd kind
 
2 • 1540797425367761006138858881 - 1
28
9 Mar 2014
 Chermoni, Wroblewski
4 • 658189097608811942204322721 - 3
28
3 Apr 2014
 Chermoni, Wroblewski
2614065594356962781728904641
28
9 Apr 2014
 Chermoni, Wroblewski
2368823992523350998418445521
28
26 Jun 2008
 Wroblewski
20193491108493165642344881
26
12 Jun 2008
 Wroblewski
2 • 1302312696655394336638441 - 1
25
10 Jun 2008
 Wroblewski
258296136493222766530021
24
8 Jun 2008
 Wroblewski
2 • 127806074555607670094731 - 1
24
5 Jun 2008
 Wroblewski
15745040405007366603151
23
25 May 2008
 Wroblewski
3203000719597029781
19
Dec 1997
 Tony Forbes, 1st known