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Record history of Cunningham Chain length 12
first member Digits When? Discoverer

1st kind
 
288320466650346626888267818984974462085357412586437032687304004479168536445314040 • 83# - 1
113
23 May 2014
 Primecoin
61592551716229060392971860549140211602858978086524024531871935735163762961673908480 • 71# - 1
110
2 Nov 2013
 Primecoin
178811043947926524937518051044987491022433869417704220317907704222148116972528580 • 71# - 1
107
3 Feb 2014
 Primecoin
8428860 • 127# + 212148902055091
56
Feb 2006
 Andersen, Primo
4431659 • 89# + 440181861259139
42
Feb 2006
 Andersen, Primo
3506572996102 • 71# - 1
40
Dec 2005
 Augustin, NewPGen, OpenPFGW
1307465 • 79# + 11500298799989
37
May 2004
 Alm, Andersen, Primo

2nd kind
 
906644189971753846618980352 • 233# + 1
121
15 May 2015
 Balyakin
160433998429454286861864982184342218645773889300991352796925862298096263175269000 • 73# + 1
109
21 Dec 2013
 Primecoin
3018970250978499232353420274403370309649101023080062032175680183412679387197178760 • 71# + 1
109
25 Jan 2014
 Primecoin
27514366944545993668422567193822444315682837691915196563994783521784099031989503616 • 41# + 1
97
12 Oct 2013
 Primecoin
263663326886409378473341387047271336974122837948496277769621396327294641140893808 • 43# + 1
97
21 Jul 2013
 Primecoin
13931865163581 • 127# + 1
62
Dec 2008
 Augustin, NewPGen, OpenPFGW