| 4997539 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 74 / 280 |
Estimated T-Level: 21.3 ⓘ TF below 2^66 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Jørgen Skjånes | 2DE32F64AA5A125E | 0 | Linux 32-bit,Prime95,v14,(aka WQ2) | | Factored | 2000-05-24 | Hermann Lex | 2DE32F64AA5A125E | 980610 | Linux 32-bit,Prime95,v19,(aka WV2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-12 | Andrey Dobrynin | 124364173D7B13FB | 1 | 4437260 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-12 | Benjamin Michaelis | CERT | Proof certified good | | 2025-03-12 | Andrey Dobrynin | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-03-12 | Andrey Dobrynin | F-ECM | Factor: 5613336113457262593930434377 / ECM curve 23, B1=50000, B2=45039225, Edwards Sigma=5087945865480557 | | 2022-09-01 | Prism Daymon | NF-PM1 | B1=7000000, B2=8975658510 | | 2021-04-25 | -anonymous- | NF | no factor TF: 71-72 | | 2021-04-24 | -anonymous- | NF | no factor TF: 70-71 | | 2021-04-23 | -anonymous- | NF | no factor TF: 69-70 | | 2021-01-05 | TJAOI | NF | no factor TF: 68-69 | | 2018-06-05 | ramgeis | NF | no factor TF: 67-68 | | 2017-05-13 | Yxinity | NF | no factor TF: 66-67 | | 2017-02-07 | Squeeky_Squirrel | NF-PM1 | B1=300000, B2=9375000, E=12 | | 2016-02-23 | Mark Rose | NF | no factor TF: 1-61 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-07-31 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-11-06 | lycorn | NF | no factor TF: 64-65 | | 2014-11-06 | lycorn | NF | no factor TF: 63-64 | | 2011-12-10 | Squeeky_Squirrel | NF-PM1 | B1=120000, B2=2430000, E=6 | | 2011-08-27 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-07-09 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=990000, E=6 | | 2009-08-31 | Carsten Kossendey | NF-PM1 | B1=25000, B2=356250 | | 2008-09-07 | Sturle Sunde | NF | no factor TF: 61-62 | | 2000-07-03 | -anonymous- | C-LL | 2DE32F64AA5A125E | | 2000-05-24 | -anonymous- | C-LL | 2DE32F64AA5A125E |
|
