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Record history of Cunningham Chain length 18
first member
Digits
When?
Discoverer
1st kind
658189097608811942204322721
27
9 Mar 2014
Chermoni, Wroblewski
182927793839529342111307801
27
8 Mar 2014
Chermoni, Wroblewski
159820395443335740374032201
27
23 Mar 2014
Chermoni, Wroblewski