| 5286937 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 57 / 280 |
Estimated T-Level: 21.0 ⓘ TF below 2^65 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-07-29 | Kelly Price | 5F85779CB1B8B845 | 0 | Linux 32-bit,Prime95,v16,(aka WS2) | | Factored | 2000-09-08 | chris clark | 5F85779CB1B8B845 | 114268 | Linux 32-bit,Prime95,v19,(aka WV2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-23 | Terry Kim | BFA7609B5119B517 | 1 | 2438492 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-24 | Carlos Pinho | CERT | Proof certified good | | 2025-02-23 | Terry Kim | C-PRP | M5286937/2098540405384330257360065641 : BFA7609B5119B517 Proof Certified Good
Proof Power: 7
| | 2025-02-16 | fordobr | F-ECM | Factor: 2098540405384330257360065641 / ECM curve 28, B1=50000, B2=35542122, Edwards Sigma=2826924106050685 | | 2021-10-14 | axn | NF-PM1 | B1=8000000, B2=400000000 | | 2021-10-11 | 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 | | 2020-10-05 | TJAOI | NF | no factor TF: 68-69 | | 2019-07-03 | USAFSS | NF-PM1 | B1=315000, B2=9371250 | | 2018-06-17 | ramgeis | NF | no factor TF: 67-68 | | 2016-06-07 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-14 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-22 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-22 | VictordeHollander | NF | no factor TF: 63-64 | | 2010-07-23 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-08-23 | Carsten Kossendey | NF-PM1 | B1=25000, B2=343750 | | 2009-06-04 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-09-08 | -anonymous- | C-LL | 5F85779CB1B8B845 | | 1998-07-29 | -anonymous- | C-LL | 5F85779CB1B8B845 | | 1998-04-27 | -anonymous- | NF | no factor TF: 1-62 |
|
