| 5363861 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 273 TF target 266 |
| 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 | 1998-09-20 | Larry English | BC74A659141D0334 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-12-14 | M Winkelman | BC74A659141D0334 | 2945617 | Linux 32-bit,Prime95,v20,(aka WW2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-10 | Perig | 8D46C56F8F9D1AC4 | 1 | 1436896 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-10 | Massimo Cappelli (ik5pwa) | CERT | Proof certified good | | 2025-03-10 | Perig | C-PRP | M5363861/870501914463691715250121 : 8D46C56F8F9D1AC4 Proof Certified Good
Proof Power: 7
| | 2025-03-04 | fordobr | F-ECM | Factor: 870501914463691715250121 / ECM curve 22, B1=50000, B2=45000000, Edwards Sigma=3682824813385865 | | 2024-05-31 | Andrew B | NF | no factor TF: 72-73 | | 2024-05-31 | Andrew B | NF | no factor TF: 71-72 | | 2022-09-17 | Sid & Andy | NF-PM1 | B1=4000000, B2=10285831710 | | 2022-02-21 | mikr | NF | no factor TF: 70-71 | | 2021-11-29 | mnd9 | NF | no factor TF: 69-70 | | 2020-09-14 | TJAOI | NF | no factor TF: 68-69 | | 2019-11-27 | King | NF-PM1 | B1=1000000, B2=22500000 | | 2019-06-23 | Numberwang | NF-PM1 | B1=125000, B2=2250000, E=12 | | 2018-06-19 | ramgeis | NF | no factor TF: 67-68 | | 2016-08-09 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-18 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-23 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-23 | VictordeHollander | NF | no factor TF: 63-64 | | 2010-09-24 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=960000, E=6 | | 2009-05-21 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-12-14 | -anonymous- | C-LL | BC74A659141D0334 | | 2000-10-07 | -anonymous- | NF-PM1 | B1=25000, B2=206250 | | 2000-06-11 | -anonymous- | NF-PM1 | B1=20000, B2=160000 | | 1998-09-20 | -anonymous- | C-LL | BC74A659141D0334 | | 1998-04-11 | -anonymous- | NF | no factor TF: 1-62 |
|
