| 3813869 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 271 TF target 264 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 214 / 280 |
Estimated T-Level: 23.8 ⓘ TF below 2^74 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-05-16 | Matthias Müller | 1883D38C9E0FA2F4 | 0 | Windows,Prime95,v15,NT service,(aka WR5) | | Factored | 1999-08-31 | Alan Vidmar | 1883D38C9E0FA2F4 | 1943108 | Windows,Prime95,v18,NT service,(aka WU5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-01 | Andrey Dobrynin | 610B17D7D8E3A80D | 1 | 3264578 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-01 | Manfred_Bruder_01-05-1988_DE | CERT | Proof certified good | | 2025-01-01 | Andrey Dobrynin | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-01-01 | Andrey Dobrynin | F-ECM | Factor: 35239501456933850990432327 / ECM curve 28, B1=96197, B2=194573610, Edwards Sigma=5921163214197716 | | 2024-12-20 | TJAOI | NF | no factor TF: 70-71 | | 2024-08-10 | Joss | NF-PM1 | B1=10000000, B2=13986682710 | | 2024-01-02 | Joss | NF-PM1 | B1=2330523, B2=5118553440 | | 2022-05-02 | DRobinsonPE | NF | no factor TF: 69-70 | | 2020-12-31 | axn | NF-PM1 | B1=15000000, B2=750000000 | | 2020-11-16 | TJAOI | NF | no factor TF: 68-69 | | 2018-10-15 | TJAOI | NF | no factor TF: 67-68 | | 2016-11-17 | Gordon Spence | NF | no factor TF: 66-67 | | 2016-08-14 | Joss | NF-PM1 | B1=222393, B2=4447860, E=6 | | 2016-02-26 | ramgeis | NF | no factor TF: 65-66 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2016-01-28 | Joss | NF-PM1 | B1=222393, B2=2223930, E=6 | | 2015-01-18 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-01-18 | VictordeHollander | NF | no factor TF: 63-64 | | 2014-09-20 | Joss | NF-PM1 | B1=81829 | | 2012-03-23 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-11-04 | Squeeky_Squirrel | NF-PM1 | B1=65000, B2=1121250, E=6 | | 2011-03-26 | markr | NF | no factor TF: 61-62 | | 2009-07-12 | Carsten Kossendey | NF-PM1 | B1=20000, B2=270000 | | 2009-02-28 | S485122 | NF | no factor TF: 60-61 | | 1999-08-31 | vidmar | C-LL | 1883D38C9E0FA2F4 | | 1998-05-16 | -anonymous- | C-LL | 1883D38C9E0FA2F4 | | 1998-03-31 | -anonymous- | NF | no factor TF: 1-60 |
|
