| 5091613 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 25 / 280 |
Estimated T-Level: 20.4 ⓘ TF below 2^63 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-12-13 | Paul Merle | 7BC111EE1B6FF1A2 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-12-07 | Peter Evans | 7BC111EE1B6FF1A2 | 2010046 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-07 | Oliver Kruse | 2D9964976B4FBF93 | 1 | 1878559 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-07 | Xyzzy | CERT | Proof certified good | | 2025-01-07 | Oliver Kruse | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-01-01 | Andrey Dobrynin | F-ECM | Factor: 6175631702446420286384849 / ECM curve 9, B1=50000, B2=47392422, Edwards Sigma=3463917241013101 | | 2022-05-22 | Sid & Andy | NF-PM1 | B1=4000000, B2=10347370110 | | 2021-04-03 | -anonymous- | NF | no factor TF: 71-72 | | 2021-04-01 | -anonymous- | NF | no factor TF: 70-71 | | 2021-04-01 | -anonymous- | NF | no factor TF: 69-70 | | 2020-12-21 | TJAOI | NF | no factor TF: 68-69 | | 2018-06-07 | ramgeis | NF | no factor TF: 67-68 | | 2017-09-10 | mikr | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2016-05-26 | Gordon Spence | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-08-03 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-09-14 | lycorn | NF | no factor TF: 64-65 | | 2014-08-30 | kracker | NF | no factor TF: 63-64 | | 2009-08-24 | USAFSS | NF-PM1 | B1=55000, B2=907500, E=6 | | 2009-07-27 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2008-12-29 | Sturle Sunde | NF | no factor TF: 61-62 | | 2000-12-07 | Peter Evans | C-LL | 7BC111EE1B6FF1A2 | | 2000-11-05 | Peter Evans | NF-PM1 | B1=20000, B2=20000 | | 1998-12-13 | -anonymous- | C-LL | 7BC111EE1B6FF1A2 | | 1998-05-23 | MadPoo 🙂 | NF | no factor TF: 1-61 |
|
