| 3876203 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 271 TF target 264 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 149 / 280 |
Estimated T-Level: 22.7 ⓘ TF below 2^70 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Steve Whitaker | 10F14C826E6C70A0 | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | 1999-09-22 | Mark Skidmore | 10F14C826E6C70A0 | 3133463 | Windows,Prime95,v18,(aka WU1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-18 | fordobr | A11AFBB57B74FF49 | 1 | 2258957 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-18 | Resolver | CERT | Proof certified good | | 2025-03-18 | fordobr | C-PRP | M3876203/557646244772938412460641 : A11AFBB57B74FF49 Proof Certified Good
Proof Power: 7
| | 2025-03-18 | fordobr | F-ECM | Factor: 557646244772938412460641 / ECM curve 8, B1=109310, B2=275660385, Edwards Sigma=3978067102217019 | | 2024-05-13 | TJAOI | NF | no factor TF: 70-71 | | 2022-10-07 | Joss | NF-PM1 | B1=1000000, B2=130364850 | | 2022-05-03 | DRobinsonPE | NF-PM1 | B1=8700000, B2=44938513620 | | 2022-04-28 | Joss | NF-PM1 | B1=500000, B2=130364850 | | 2022-04-19 | Joss | NF-PM1 | B1=500000 | | 2022-02-10 | Gordon Spence | NF | no factor TF: 69-70 | | 2021-11-18 | Aaron Haviland | NF-PM1 | B1=450000, B2=13500000, E=12 | | 2020-11-23 | Carlos Pinho | NF-PM1 | B1=170000, B2=4717000 | | 2020-08-11 | TJAOI | NF | no factor TF: 68-69 | | 2019-01-20 | Yxinity | NF | no factor TF: 67-68 | | 2016-11-26 | Gordon Spence | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2016-02-23 | Mark Rose | NF | no factor TF: 1-60 | | 2016-02-18 | ramgeis | NF | no factor TF: 65-66 | | 2016-02-03 | Joss | NF-PM1 | B1=239500, B2=2395000, E=6 | | 2015-01-18 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-01-18 | VictordeHollander | NF | no factor TF: 63-64 | | 2014-10-26 | Joss | NF-PM1 | B1=86558 | | 2012-02-29 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-10-17 | Squeeky_Squirrel | NF-PM1 | B1=70000, B2=1137500, E=6 | | 2011-02-16 | markr | NF | no factor TF: 61-62 | | 2009-07-30 | Carsten Kossendey | NF-PM1 | B1=20000, B2=275000 | | 2009-02-25 | S485122 | NF | no factor TF: 60-61 | | 1999-09-22 | -anonymous- | C-LL | 10F14C826E6C70A0 |
|
