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