| Factors |
|---|
| MMp |
# |
Researcher |
Fattore |
K |
bit |
Software |
Year |
Cofactor |
Notes |
|---|
| 13 |
5 |
Phil Moore |
210,206,826,754,181,116,960,268,153,802,790,907,756,412,928 |
12,831,572,869,868,215,783,125,405,032,094,474,698,752 |
147.237 |
Prime95 ECM |
2003-06-12 |
composite, c2410 |
|
| 13 |
5 |
Wilfrid Keller |
338,193,759,479 |
20,644,229 |
38.2991 |
TR 440 assembly |
1976-01-01 |
composite |
|
| 17 |
6 |
Raphael Robinson |
231,733,529 |
884 |
27.7879 |
IBM 701 assembly |
1957-04-30 |
composite |
Found during the period February-April 1957 |
| 17 |
6 |
Wilfrid Keller |
64,296,354,767 |
245,273 |
35.904 |
TR 440 assembly |
1981-11-27 |
composite, c39438 |
|
| 19 |
7 |
Phil Moore |
2,106,734,551,102,073,299,118,587,904 |
2,009,142,465,006,831,403,008 |
90.7671 |
Prime95 ECM |
2003-03-20 |
composite |
|
| 19 |
7 |
Phil Moore |
4,565,880,376,922,810,772,321,857,603,739,972,534,272 |
4,354,371,152,558,437,226,704,556,003,426,304 |
131.746 |
Prime95 ECM |
2023-12-06 |
composite |
|
| 19 |
7 |
Will Edgington - Wilfrid Keller |
5,746,991,873,407 |
5,480,769 |
42.3859 |
mers - Ubasic |
1994-08-20 |
composite |
The date of discovery of the factor by Will Edgington is unknown |
| 19 |
7 |
Raphael Robinson |
62,914,441 |
60 |
25.9069 |
IBM 701 assembly |
1957-04-30 |
composite |
Found during the period February-April 1957 |
| 19 |
7 |
Phil Moore |
65,997,004,087,015,989,723,013,350,162,432 |
62,939,767,805,625,530,920,730,624 |
105.702 |
Prime95 ECM |
2011-09-30 |
composite, c157749 |
|
| 19 |
7 |
Phil Moore |
824,271,579,602,877,114,964,194,099,200 |
786,088,134,555,002,493,468,672 |
99.379 |
Prime95 ECM |
2000-12-06 |
composite |
|
| 31 |
8 |
Ernst Mayer |
178,021,379,228,511,212,929,024 |
41,448,832,329,225 |
77.2364 |
Mfactor |
2005-06-20 |
composite |
|
| 31 |
8 |
Reto Keiser |
242,557,615,644,693,266,432 |
56,474,845,800 |
67.7169 |
MFAC 2.27 |
1999-12-06 |
composite |
|
| 31 |
8 |
Wilfrid Keller |
295,257,526,626,031 |
68,745 |
48.069 |
TR 440 assembly |
1981-11-27 |
composite |
|
| 31 |
8 |
Tony Forbes - Wilfrid Keller |
87,054,709,261,955,184 |
20,269,004 |
56.2728 |
unknown - Ubasic |
1994-08-20 |
composite |
The program and date of discovery of the factor by Tony Forbes is unknown |