| 5527547 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 22 / 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 |
|---|
| Factored | | Henner Wessel | 6C43CEFAC3A9F76C | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-09-23 | Peter Evans | 6C43CEFAC3A9F76C | 1997796 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-04-11 | ANONYMOUS | 8BDC8ACB4D527303 | 1 | 3944355 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-04-11 | V0rtex762 | CERT | Proof certified good | | 2025-04-11 | ANONYMOUS | C-PRP | M5527547/4537565964518246748746513 : 8BDC8ACB4D527303 Proof Certified Good
Proof Power: 7
| | 2025-03-29 | fordobr | F-ECM | Factor: 4537565964518246748746513 / ECM curve 7, B1=50000, B2=64850000, Edwards Sigma=6203379929351408 | | 2021-10-31 | 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 | | 2021-08-19 | SRBase | NF | no factor TF: 69-70 | | 2020-08-24 | TJAOI | NF | no factor TF: 68-69 | | 2019-09-09 | GdS | NF-PM1 | B1=200000, B2=6000000 | | 2018-07-05 | ramgeis | NF | no factor TF: 67-68 | | 2016-07-22 | Gordon Spence | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 1-62 | | 2015-08-31 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-08 | monst | NF | no factor TF: 64-65 | | 2014-12-07 | Nesowa | NF | no factor TF: 63-64 | | 2009-05-24 | Rob_Dee | NF-PM1 | B1=65000, B2=1121250, E=6 | | 2009-04-28 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-09-23 | Peter Evans | C-LL | 6C43CEFAC3A9F76C | | 2000-07-25 | Peter Evans | NF-PM1 | B1=20000, B2=20000 |
|
