Record history of Cunningham Chain length 5

first member Digits When? Discoverer

1st kind
 
31017701152691334912 ⋅ 4091# - 1
1765
3 Nov 2016
Balyakin
3387614923 ⋅ 3917# - 1
1680
15 Oct 2016
Angel, Augustin, NewPGen, OpenPFGW
199949435137 ⋅ 3499# - 1
1493
2 Mar 2016
Östlin, NewPGen, OpenPFGW
361296035282 ⋅ 3023# - 1
1299
25 Mar 2015
Batalov, NewPGen, OpenPFGW
4250172704 ⋅ 2749# - 1
1183
Mar 2012
Augustin, NewPGen, OpenPFGW
587027392600 ⋅ 2477# - 1
1069
29 Mar 2016
Östlin, NewPGen, OpenPFGW
357487161295 ⋅ 1693# - 1
727
May 2008
Augustin, NewPGen, OpenPFGW
148809453 ⋅ 1069# - 1
460
Nov 2001
Augustin, NewPGen, OpenPFGW
828114253 ⋅ 991# - 1
422
Aug 2001
Frind, NewPGen, OpenPFGW
504856309 ⋅ 953# - 1
407
Aug 2000
Augustin, NewPGen, OpenPFGW
427383180 ⋅ 797# - 1
339
Jul 2000
Augustin, NewPGen, OpenPFGW
1217763452 ⋅ 601# - 1
257
20 Jun 2000
Augustin, NewPGen, OpenPFGW
206262090 ⋅ 479# - 1
207
7 Jun 2000
Augustin, NewPGen, OpenPFGW
463419585 ⋅ 2353 - 1
115
Mar 2000
Augustin, NewPGen, Proth
96952995 ⋅ 2258 - 1
86
Dec 1999
Augustin, Proth
9006546615 ⋅ 2223 - 1
78
Nov 1999
Jobling

2nd kind
 
181439827616655015936 ⋅ 4673# + 1
2018
8 Nov 2016
Balyakin
6413732664 ⋅ 3797# + 1
1630
29 Sep 2016
Angel, Augustin, NewPGen, OpenPFGW
646737879652976640 ⋅ 3559# + 1
1535
10 Mar 2016
Balyakin
26483492454758573330432 ⋅ 3109# + 1
1342
17 Dec 2015
Balyakin
56185437312 ⋅ 3001# + 1
1288
21 Mar 2015
Batalov, NewPGen, OpenPFGW
2658132486528 ⋅ 2969# + 1
1279
1 Jul 2017
Östlin, NewPGen, OpenPFGW
1413951139648 ⋅ 2969# + 1
1279
1 Jul 2017
Östlin, NewPGen, OpenPFGW
80670856865 ⋅ 2677# + 1
1140
Jan 2011
Angel, NewPGen, OpenPFGW
45008010405 ⋅ 2621# + 1
1116
Jul 2010
Broadhurst, NewPGen, OpenPFGW
1719674368 ⋅ 1447# + 1
613
Nov 2004
Augustin, NewPGen, OpenPFGW
496391760 ⋅ 1277# + 325305140161
540
Sep 2004
Andersen, Primo
51946113 ⋅ 1193# + 1
509
Feb 2002
Augustin, NewPGen, OpenPFGW
518179995 ⋅ 2308 + 1
102
Jan 2000
Augustin, Proth
392651625 ⋅ 2222 + 1
76
Oct 1999
Augustin, Proth