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Record history of Cunningham Chain length 15
first member Digits When? Discoverer

1st kind
 
14354792166345299956567113728 • 43# - 1
45
1 Jan 2016
 Balyakin
14366587870229772953764096 • 43# - 1
42
17 Dec 2015
 Balyakin
27353790674175627273118204975428644651729
41
25 Apr 2014
 Wroblewski
662311489517467124375039
24
29 May 2008
 Wroblewski
196426752643710966405599
24
28 May 2008
 Wroblewski
11993367147962683402919
23
Oct 2004
 Alm, Andersen, Primo
4678714760875524493409
22
Sep 2003
 Tony Forbes

2nd kind
 
67040002730422542592 • 53# + 1
40
10 Mar 2016
 Balyakin
25939635974573655642 • 53# + 1
39
15 May 2015
 Balyakin
28320350134887132315879689643841
32
17 Jun 2008
 Wroblewski
71838292723844326926417601
26
12 Jun 2008
 Wroblewski
5830768257311375388822241
25
10 Jun 2008
 Wroblewski
2817673877915370357723841
25
5 Jun 2008
 Wroblewski
105998574608115401372161
24
26 May 2008
 Wroblewski
2 • 15745040405007366603151 - 1
23
25 May 2008
 Wroblewski
54269795934721528591
20
Sep 1997
 Tony Forbes