| 5444897 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 14 / 280 |
Estimated T-Level: 20.3 ⓘ TF below 2^62 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-11-07 | William Kloek | E4737AD6ADC10784 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-07-17 | Ron Lavallee | E4737AD6ADC10784 | 2532684 | Windows,Prime95,v20,NT service,(aka WW5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-21 | Stefan G Hoffmann | 8C0ACF3985B566B8 | 1 | 283228 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-21 | zar | CERT | Proof certified good | | 2025-03-21 | Stefan G Hoffmann | C-PRP | M5444897/21128550547209529964663 : 8C0ACF3985B566B8 Proof Certified Good
Proof Power: 7
| | 2025-03-16 | fordobr | F-ECM | Factor: 21128550547209529964663 / ECM curve 3, B1=50000, B2=64857975, Edwards Sigma=1991258864859626 | | 2022-07-08 | Sid & Andy | NF-PM1 | B1=5000000, B2=6421800462 | | 2021-10-17 | SRBase | NF | no factor TF: 71-72 | | 2021-08-23 | SRBase | NF | no factor TF: 70-71 | | 2021-08-18 | SRBase | NF | no factor TF: 69-70 | | 2021-06-10 | Dylan Delgado | NF-PM1 | B1=1800000, B2=140400000 | | 2020-08-17 | TJAOI | NF | no factor TF: 68-69 | | 2019-08-25 | Ivan M | NF-PM1 | B1=1500000, B2=30000000 | | 2018-06-29 | ramgeis | NF | no factor TF: 67-68 | | 2016-06-25 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-23 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-31 | monst | NF | no factor TF: 64-65 | | 2014-12-31 | snme2pm1 | NF | no factor TF: 63-64 | | 2010-04-20 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=1035000, E=6 | | 2009-05-10 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-07-17 | RonLavallee | C-LL | E4737AD6ADC10784 | | 2000-06-28 | RonLavallee | NF-PM1 | B1=20000, B2=20000 | | 1998-11-07 | -anonymous- | C-LL | E4737AD6ADC10784 | | 1998-04-05 | -anonymous- | NF | no factor TF: 1-62 |
|
