| 5481241 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 53 / 280 |
Estimated T-Level: 20.9 ⓘ TF below 2^65 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1999-01-17 | Walter Welton-Lair | 96DEA276F72C663C | 0 | Windows,Prime95,v17,NT service,(aka WT5) | | Factored | 2000-08-17 | Herbert Brandner | 96DEA276F72C663C | 339675 | Windows,Prime95,v20,(aka WW1) | | Factored | 2015-05-02 | MadPoo 🙂 | 96DEA276F72C663C | 1738971 | Windows 64-bit,Prime95,v26,(aka We4) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-27 | Sly_007 | 5041276CE3554CC2 | 1 | 4915936 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-27 | mattashii | CERT | Proof certified good | | 2025-03-27 | Sly_007 | C-PRP | M5481241/1217564816865684273035639 : 5041276CE3554CC2 Proof Certified Good
Proof Power: 7
| | 2025-03-21 | fordobr | F-ECM | Factor: 1217564816865684273035639 / ECM curve 25, B1=50000, B2=45039225, Edwards Sigma=5129780354809048 | | 2021-11-17 | axn | NF-PM1 | B1=8000000, B2=400000000 | | 2021-09-26 | SRBase | NF | no factor TF: 71-72 | | 2021-08-25 | SRBase | NF | no factor TF: 70-71 | | 2021-08-18 | SRBase | NF | no factor TF: 69-70 | | 2020-08-24 | TJAOI | NF | no factor TF: 68-69 | | 2019-09-29 | USAFSS | NF-PM1 | B1=330000, B2=9817500 | | 2018-06-29 | ramgeis | NF | no factor TF: 67-68 | | 2016-07-06 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-25 | snme2pm1 | NF | no factor TF: 65-66 | | 2015-05-02 | MadPoo 🙂 | C-LL | 96DEA276F72C663C | | 2014-11-29 | lycorn | NF | no factor TF: 64-65 | | 2014-11-29 | lycorn | NF | no factor TF: 63-64 | | 2010-05-19 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=1035000, E=6 | | 2009-05-03 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2001-11-03 | -anonymous- | NF-PM1 | B1=20000, B2=60000 | | 2001-11-03 | -anonymous- | C-LL | 96DEA276F72C663C | | 2000-08-17 | -anonymous- | C-LL | 96DEA276F72C663C | | 2000-07-12 | -anonymous- | NF-PM1 | B1=20000, B2=60000 | | 1999-01-17 | -anonymous- | C-LL | 96DEA276F72C663C | | 1998-05-23 | -anonymous- | NF | no factor TF: 1-62 | | 1998-04-05 | -anonymous- | NF | no factor TF: 1-61 |
|
