| 5263393 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 23 / 280 |
Estimated T-Level: 20.4 ⓘ TF below 2^63 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Bad | 1999-11-04 | Team love_fest | 368DDE9F80757511 | 13722 | Windows,Prime95,v18,(aka WU1) | | Factored | 2001-01-28 | Gordon M. Spence | 3137CE082F134F14 | 3972959 | Windows,Prime95,v20,(aka WW1) | | Factored | 2001-07-03 | Ariel2 | 3137CE082F134F14 | 2291671 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-18 | Massimo Cappelli (ik5pwa) | 437653481B193F11 | 1 | 1666659 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-21 | HASHTAG | CERT | Proof certified good | | 2025-02-18 | Massimo Cappelli (ik5pwa) | C-PRP | M5263393/84410211441412903261673 : 437653481B193F11 Proof Certified Good
Proof Power: 7
| | 2025-02-12 | fordobr | F-ECM | Factor: 84410211441412903261673 / ECM curve 7, B1=50000, B2=88250000, Edwards Sigma=931280474449531 | | 2021-10-02 | axn | NF-PM1 | B1=8000000, B2=400000000 | | 2021-09-25 | SRBase | NF | no factor TF: 71-72 | | 2021-08-23 | SRBase | NF | no factor TF: 70-71 | | 2021-08-19 | SRBase | NF | no factor TF: 69-70 | | 2020-11-29 | Carlos Pinho | NF-PM1 | B1=228000, B2=7362000 | | 2020-11-23 | TJAOI | NF | no factor TF: 68-69 | | 2019-06-23 | Numberwang | NF-PM1 | B1=125000, B2=2187500, E=12 | | 2019-06-22 | Numberwang | NF-PM1 | B1=100000, B2=1575000 | | 2018-06-17 | ramgeis | NF | no factor TF: 67-68 | | 2016-06-05 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-13 | 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 | | 2009-10-31 | USAFSS | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-06-07 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2003-10-23 | -anonymous- | C-LL | 3137CE082F134F14 | | 2003-10-23 | -anonymous- | NF-PM1 | B1=20000, B2=190000 | | 2003-07-13 | -anonymous- | C-LL | 3137CE082F134F14 | | 2003-07-13 | -anonymous- | NF-PM1 | B1=20000, B2=190000 | | 2001-07-03 | -anonymous- | C-LL | 3137CE082F134F14 | | 2001-05-20 | -anonymous- | NF-PM1 | B1=20000, B2=190000 | | 2001-02-25 | Gordon Spence | C-LL | 3137CE082F134F14 | | 2001-01-28 | Gordon Spence | C-LL | 3137CE082F134F14 | | 2000-02-23 | barryh | C-LL | 19E32EAFDD0570__ | | 1999-11-04 | -anonymous- | C-LL | 368DDE9F80757511 | | 1998-12-21 | barryh | C-LL | 19E32EAFDD0570__ | | 1998-07-29 | -anonymous- | NF | no factor TF: 1-62 | | 1998-02-12 | -anonymous- | NF | no factor TF: 1-61 |
|
