| 5214637 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 88 / 280 |
Estimated T-Level: 21.6 ⓘ TF below 2^67 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Ken Kriesel | 3ECFDE01BBEF6539 | 0 | Windows,Prime95,v14,NT service,(aka WQ5) | | Factored | 2000-06-11 | John Leith | 3ECFDE01BBEF6539 | 2186361 | Windows,Prime95,v19,(aka WV1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-04-03 | Perig | C996E955C7403BF3 | 1 | 4447240 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-04-03 | owuh | CERT | Proof certified good | | 2025-04-03 | Perig | C-PRP | M5214637/101429870486544114888391 : C996E955C7403BF3 Proof Certified Good
Proof Power: 7
| | 2025-03-29 | fordobr | F-ECM | Factor: 101429870486544114888391 / ECM curve 32, B1=50000, B2=64857975, Edwards Sigma=6581178443814601 | | 2022-01-28 | happy5214 | NF-PP1 | Start=2/7, B1=1250000, B2=40000000 | | 2022-01-28 | happy5214 | NF-PM1 | B1=2500000, B2=4719785070 | | 2021-09-16 | SRBase | NF | no factor TF: 71-72 | | 2021-08-23 | SRBase | NF | no factor TF: 70-71 | | 2021-08-17 | SRBase | NF | no factor TF: 69-70 | | 2020-11-30 | TJAOI | NF | no factor TF: 68-69 | | 2018-06-17 | ramgeis | NF | no factor TF: 67-68 | | 2018-04-25 | Squeeky_Squirrel | NF-PM1 | B1=310000, B2=9222500, E=12 | | 2016-05-28 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-10 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-19 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-19 | VictordeHollander | NF | no factor TF: 63-64 | | 2010-06-09 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-08-22 | Carsten Kossendey | NF-PM1 | B1=25000, B2=337500 | | 2009-06-18 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-06-11 | -anonymous- | C-LL | 3ECFDE01BBEF6539 | | 1999-01-10 | -anonymous- | C-LL | 8C0DF7F4CC549C__ | | 1998-05-23 | -anonymous- | NF | no factor TF: 1-62 | | 1998-03-31 | -anonymous- | NF | no factor TF: 1-61 |
|
