Largest known probable prime Mersenne Cofactors (proper divisor of 2p-1 with p prime)
|
Cofactor |
Digits |
When |
Found by |
|---|---|---|---|
|
(21168183-1)/54763676838381762583 |
351639 |
01/2011 |
Matthias Wurtinger |
|
(2684127-1)/23765203727 |
205933 |
04/2009 |
Jens Kruse Andersen |
|
(2406583-1)/813167 |
122388 |
02/2009 |
Jens Kruse Andersen |
|
(2271549-1)/238749682487 |
81734 |
02/2009 |
Jens Kruse Andersen |
|
(2271211-1)/613961495159 |
81631 |
02/2009 |
Jens Kruse Andersen |
|
(2221509-1)/292391881 |
66673 |
02/2009 |
Jens Kruse Andersen |
|
(2173867-1)/52536637502689 |
52326 |
06/2005 |
Donovan Johnson |
|
(2136883-1)/536581361 |
41198 |
05/2005 |
Donovan Johnson |
|
(2130439-1)/260879 |
39261 |
05/2005 |
Donovan Johnson |
|
(2106391-1)/286105171290931103 |
32010 |
05/2005 |
Donovan Johnson |
|
(287691-1)/806957040167570408395443233 |
26371 |
11/2009 |
D. Broadhurst and W. Edgington |
|
(286371-1)/41681512921035887 |
25984 |
05/2005 |
Donovan Johnson |
|
(286137-1)/20021531730209833250959969231661791 |
25896 |
02/2011 |
D. Broadhurst and W. Edgington |
|
(282939-1)/883323903012540278033571819073 |
24938 |
11/2009 |
D. Broadhurst and W. Edgington |
|
(287005-1)/(217401-1)/31 |
20952 |
07/2007 |
Lelio R. Paula |
|
(270129-1)/(23691-1)/524287 |
19995 |
12/2007 |
Lelio R. Paula |
|
(263703-1)/42808417 |
19169 |
05/2005 |
Donovan Johnson |
|
(258199-1)/237604901713907577052391 |
17497 |
05/2005 |
Donovan Johnson |
|
(285881-1)/(228627-1)/7 |
17235 |
12/2007 |
Lelio R. Paula |
|
(257131-1)/61481396117165983261035042726614288722959856631 |
17152 |
09/2009 |
D. Broadhurst and W. Edgington |
|
(270617-1)/(223539-1)/7 |
14172 |
12/2007 |
Lelio R. Paula |
|
(269933-1)/(223311-1)/7 |
14034 |
12/2007 |
Lelio R. Paula |
|
(241521-1)/41602235382028197528613357724450752065089 |
12459 |
09/2010 |
D. Broadhurst and W. Edgington |
|
(241263-1)/1379707143199991617049286121 |
12395 |
05/2004 |
Donovan Johnson |
|
(242991-1)/(23307-1)/8191 |
11943 |
12/2007 |
Lelio R. Paula |
All probable prime cofactors on this page are listed on Henri Lifchitz's Top 10000 PRPs page. Click here to view.
20 largest known prime Mersenne cofactors (The Prime Pages)
Will Edgington's Mersenne Page
Biography of Marin Mersenne
Main page
Last updated on August 12, 2011
Donovan Johnson