Bi-twin chain length 3 - history
n = 0 → base twin prime n's  Digits  When Discoverer
204035674219 • 1609# • 2n ± 1 0..2 695+ Jul 2016 Didier Boivin
1223192988150163045760 • 1531# • 2n ± 1 0..2 666+ Apr 2015 Andrey Balyakin
60990063542 • 991# • 2n ± 1 0..2 424+ Nov 2015 Oscar Östlin
10638895656 • 937# • 2n ± 1 0..2 399+ Feb 2006 Dirk Augustin
100040320780229 • 787# • 2n ± 1 0..2 342+ Mar 2005 Gary Chaffey
1632879815 • 787# • 2n ± 1 0..2 336+ May 2004 Dirk Augustin
(617210015 • 727# + 111711600) • 2n ± 1 0..2 310+ Mar 2004 Torbjörn Alm & Jens K. Andersen
(220233729 • 727# + 1416349935) • 2n ± 1 0..2 310+ Mar 2004 Torbjörn Alm & Jens K. Andersen
996845400 • 719# • 2n ± 1 0..2 307+ Nov 2002 Dirk Augustin
12133509469 • 557# • 2n ± 1 0..2 236+ Nov 2002 Didier Boivin
12056273234 • 557# • 2n ± 1 0..2 236+ Nov 2002 Gary Chaffey
13656954405 • 547# • 2n ± 1 0..2 233+ Oct 2002 Gary Chaffey
1096855446 • 509# • 2n ± 1 0..2 221+ Nov 2001 Didier Boivin
514930268700672 • 499# • 2n ± 1 0..2 215+ Oct 2000 Dirk Augustin
1288621071 • 467# • 2n ± 1 0..2 205+ Aug 2000 Dirk Augustin