| 4917217 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 48 / 280 |
Estimated T-Level: 20.9 ⓘ TF below 2^64 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Ken Kriesel | 1BC115319E605446 | 0 | Windows,Prime95,v14,NT service,(aka WQ5) | | Factored | 2000-03-08 | Thomas Traber | 1BC115319E605446 | 666796 | Linux 32-bit,Prime95,v19,(aka WV2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-31 | fordobr | 058701D3F327A678 | 1 | 758631 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-31 | yellow_galaxy | CERT | Proof certified good | | 2025-03-31 | fordobr | C-PRP | M4917217/654412750823798522890686713 : 058701D3F327A678 Proof Certified Good
Proof Power: 7
| | 2025-03-31 | fordobr | F-ECM | Factor: 654412750823798522890686713 / ECM curve 2, B1=53823, B2=64857975, Edwards Sigma=342342202225393 | | 2023-04-05 | Sid & Andy | NF-PM1 | B1=4000000, B2=10397372700 | | 2021-04-26 | -anonymous- | NF | no factor TF: 71-72 | | 2021-04-24 | -anonymous- | NF | no factor TF: 70-71 | | 2021-04-23 | -anonymous- | NF | no factor TF: 69-70 | | 2021-03-08 | TJAOI | NF | no factor TF: 68-69 | | 2018-05-23 | ramgeis | NF | no factor TF: 67-68 | | 2017-10-28 | Yxinity | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-07-25 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-29 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-29 | VictordeHollander | NF | no factor TF: 63-64 | | 2014-10-09 | mikr | NF-PM1 | B1=1200000, B2=39750000, E=12 | | 2011-09-11 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-07-13 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=960000, E=6 | | 2010-04-02 | Squeeky_Squirrel | NF | no factor TF: 61-62 | | 2009-08-24 | Carsten Kossendey | NF-PM1 | B1=30000, B2=435000 | | 2000-03-08 | -anonymous- | C-LL | 1BC115319E605446 | | 1998-12-27 | -anonymous- | C-LL | 84049629FA2918__ | | 1998-08-24 | -anonymous- | NF | no factor TF: 1-61 |
|
