| 5143253 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 70 / 280 |
Estimated T-Level: 21.3 ⓘ TF below 2^66 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-07-29 | Ethan Hansen | A6073DFC8F3DEE38 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2001-01-28 | Jean-Yves Canart | A6073DFC8F3DEE38 | 1774570 | Windows,Prime95,v19,(aka WV1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-08 | Vamazing_ | FC22F6239D4717BE | 1 | 552772 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-08 | George Woltman | CERT | Proof certified good | | 2025-03-08 | Vamazing_ | C-PRP | M5143253/69416295009704412649687 : FC22F6239D4717BE Proof Certified Good
Proof Power: 7
| | 2025-02-27 | fordobr | F-ECM | Factor: 69416295009704412649687 / ECM curve 32, B1=50000, B2=25127190, Edwards Sigma=5383429365667962 | | 2024-09-21 | Andrew B | NF | no factor TF: 71-72 | | 2022-07-27 | Sid & Andy | NF-PM1 | B1=4000000, B2=9110873310 | | 2022-01-19 | mikr | NF | no factor TF: 70-71 | | 2022-01-14 | Gordon Spence | NF | no factor TF: 69-70 | | 2020-10-12 | TJAOI | NF | no factor TF: 68-69 | | 2019-05-01 | USAFSS | NF-PM1 | B1=305000, B2=9683750 | | 2018-06-20 | ramgeis | NF | no factor TF: 67-68 | | 2016-05-28 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-07 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-16 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-16 | VictordeHollander | NF | no factor TF: 63-64 | | 2009-11-06 | S485122 | NF | no factor TF: 62-63 | | 2009-09-22 | USAFSS | NF-PM1 | B1=60000, B2=1065000, E=6 | | 2008-10-10 | Sturle Sunde | NF | no factor TF: 61-62 | | 2001-01-28 | JC | C-LL | A6073DFC8F3DEE38 | | 2000-07-12 | -anonymous- | NF-PM1 | B1=25000, B2=162500 | | 1998-07-29 | Dry Creek Photo | C-LL | A6073DFC8F3DEE38 | | 1998-01-16 | -anonymous- | NF | no factor TF: 1-61 |
|
