| 5400559 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 273 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 29 / 280 |
Estimated T-Level: 20.5 ⓘ TF below 2^63 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-10-11 | Barry Dean | F5F58214FFA25974 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-08-01 | Shel Michaels | F5F58214FFA25974 | 270082 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-04-01 | Perig | 4D72E1D0A0AFAFD7 | 1 | 4174664 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-04-01 | KIM | CERT | Proof certified good | | 2025-04-01 | Perig | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-03-27 | Andrey Dobrynin | F-ECM | Factor: 117973012351355719494384233 / ECM curve 7, B1=50000, B2=64857975, Edwards Sigma=913764298356040 | | 2021-11-24 | axn | NF-PM1 | B1=8000000, B2=400000000 | | 2021-10-31 | Bill Staffen | NF | no factor TF: 72-73 | | 2021-09-16 | SRBase | NF | no factor TF: 71-72 | | 2021-08-31 | SRBase | NF | no factor TF: 70-71 | | 2021-08-18 | SRBase | NF | no factor TF: 69-70 | | 2021-06-06 | Dylan Delgado | NF-PM1 | B1=600000, B2=36600000 | | 2020-10-05 | TJAOI | NF | no factor TF: 68-69 | | 2018-06-29 | ramgeis | NF | no factor TF: 67-68 | | 2016-06-18 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-21 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-25 | monst | NF | no factor TF: 64-65 | | 2014-12-24 | Nesowa | NF | no factor TF: 63-64 | | 2013-09-13 | Markus Tervooren | NF-PM1 | B1=500000, B2=5000000, E=6 | | 2010-10-14 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=960000, E=6 | | 2007-12-31 | abc | NF | no factor TF: 1-63 | | 2000-08-01 | -anonymous- | C-LL | F5F58214FFA25974 | | 2000-06-29 | -anonymous- | NF-PM1 | B1=25000, B2=212500 | | 1998-10-11 | -anonymous- | C-LL | F5F58214FFA25974 | | 1998-05-16 | -anonymous- | NF | no factor TF: 1-62 |
|
