| 5087773 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 60 / 280 |
Estimated T-Level: 21.1 ⓘ TF below 2^65 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-09-13 | Matthew Ashton | 34A91A1A094A62D2 | 0 | Linux 32-bit,Prime95,v16,(aka WS2) | | Factored | 2000-09-23 | Marc Getty / Phil Fizur | 34A91A1A094A62D2 | 2527993 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-13 | Stefan G Hoffmann | 85790783E3072287 | 1 | 4615259 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-13 | George Woltman | CERT | Proof certified good | | 2025-03-13 | Stefan G Hoffmann | C-PRP | M5087773/69583545348752999477327 : 85790783E3072287 Proof Certified Good
Proof Power: 7
| | 2025-03-07 | fordobr | F-ECM | Factor: 69583545348752999477327 / ECM curve 20, B1=50000, B2=35500000, Edwards Sigma=583348991858738 | | 2022-05-12 | Sid & Andy | NF-PM1 | B1=4000000, B2=9313940790 | | 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 | | 2020-12-28 | TJAOI | NF | no factor TF: 68-69 | | 2018-06-07 | ramgeis | NF | no factor TF: 67-68 | | 2017-08-13 | mikr | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2016-05-25 | 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 | | 2014-09-01 | kracker | NF | no factor TF: 63-64 | | 2009-08-23 | 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 | | 2000-09-23 | -anonymous- | C-LL | 34A91A1A094A62D2 | | 2000-09-15 | -anonymous- | NF-PM1 | B1=25000, B2=231250 | | 2000-06-23 | -anonymous- | NF-PM1 | B1=20000, B2=20000 | | 1998-09-13 | -anonymous- | C-LL | 34A91A1A094A62D2 | | 1998-06-14 | Matt Perry | NF | no factor TF: 1-61 |
|
