| 2445887 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| P-1 factors | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 213 / 280 |
Estimated T-Level: 23.8 ⓘ TF below 2^74 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Zyg Furmaniuk | 50D3B31787C589CD | 0 | Windows,Prime95,v13,(aka WP1) | | Factored | 1999-03-26 | Chuck White | 50D3B31787C589CD | 1861216 | Windows,Prime95,v17,(aka WT1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-10-13 | Oliver Kruse | 61FD96C857BA0E51 | 1 | 409778 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-11-28 | storm5510 | 61FD96C857BA0E51 | 1 | 1680737 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-03-10 | LordJulius | NF | no factor TF: 1-60 | | 2018-09-28 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-11-28 | storm5510 | C-PRP | M2445887/7221396333648348502481 : 61FD96C857BA0E51 | | 2017-10-13 | Oliver Kruse | C-PRP | M2445887/7221396333648348502481 : 61FD96C857BA0E51 | | 2014-01-24 | mikr | F-PM1 | Factor: 7221396333648348502481 | | 2013-12-04 | Jerry Hallett | NF | no factor TF: 62-63 | | 2011-10-04 | Sebastian Hornbostel | NF | no factor TF: 61-62 | | 2011-01-18 | Oscar Östlin | NF-PM1 | B1=95000, B2=1947500, E=6 | | 2010-11-19 | Joss | NF-PM1 | B1=20000 | | 2009-01-14 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-10-31 | Team Prime Rib | NF-PM1 | B1=15000, B2=217500 | | 2003-10-14 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-03-26 | -anonymous- | C-LL | 50D3B31787C589CD | | 1999-03-15 | -anonymous- | NF | no factor TF: 1-59 |
|
