| 3938471 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 271 TF target 264 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 141 / 280 |
Estimated T-Level: 22.5 ⓘ TF below 2^70 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | INTERSHOP Communications | 3B7AE290B4EE492C | 0 | Windows,Prime95,v14,NT service,(aka WQ5) | | Factored | 1999-08-31 | Brian Rodenkirk | 3B7AE290B4EE492C | 366431 | 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 | fordobr | 52FF1F0257C9C4B5 | 1 | 2641248 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-03 | Joss | NF-PM1 | B1=10615290, B2=26215679490 | | 2025-01-01 | LOBES | CERT | Proof certified good | | 2025-01-01 | fordobr | C-PRP | M3938471/11992026987388776253241 : 52FF1F0257C9C4B5 Proof Certified Good
Proof Power: 7
| | 2025-01-01 | fordobr | F-ECM | Factor: 11992026987388776253241 / ECM curve 12, B1=88449, B2=127129275, Edwards Sigma=1982725471419954 | | 2023-07-02 | Sid & Andy | NF-PM1 | B1=5200000, B2=16199353170 | | 2022-12-19 | Joss | NF-PM1 | B1=1000000, B2=474539520 | | 2022-10-31 | Joss | NF-PM1 | B1=1000000, B2=119860650 | | 2022-05-13 | Joss | NF-PM1 | B1=500000, B2=119860650 | | 2021-06-03 | -anonymous- | NF | no factor TF: 70-71 | | 2021-04-28 | axn | NF | no factor TF: 69-70 | | 2020-05-08 | TJAOI | NF | no factor TF: 68-69 | | 2019-01-07 | TJAOI | NF | no factor TF: 67-68 | | 2019-01-07 | Yxinity | NF | no factor TF: 67-68 | | 2017-07-10 | Joss | NF-PM1 | B1=380160, B2=3801600, E=6 | | 2016-12-11 | Gordon Spence | NF | no factor TF: 66-67 | | 2016-05-02 | Joss | NF-PM1 | B1=190080, B2=3421440 | | 2016-04-29 | Joss | NF-PM1 | B1=190080, B2=2993686, E=6 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2016-02-14 | ramgeis | NF | no factor TF: 65-66 | | 2015-01-14 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-01-14 | VictordeHollander | NF | no factor TF: 63-64 | | 2014-11-10 | Joss | NF-PM1 | B1=86297 | | 2012-02-20 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-09-27 | Squeeky_Squirrel | NF-PM1 | B1=70000, B2=1190000, E=6 | | 2011-03-11 | Grant McCracken | NF | no factor TF: 61-62 | | 2009-08-01 | Carsten Kossendey | NF-PM1 | B1=20000, B2=285000 | | 2009-01-02 | Architects Cubed | NF | no factor TF: 60-61 | | 1999-08-31 | -anonymous- | C-LL | 3B7AE290B4EE492C | | 1998-07-11 | Jon Strayer | NF | no factor TF: 1-60 | | 1998-01-16 | Amperio | C-LL | 3B7AE290B4EE492C | | 1997-12-09 | Jon Strayer | NF | no factor TF: 1-60 |
|
