| 5518351 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 23 / 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 | 1999-05-09 | Alan Vidmar | B3E597EBE70DE7E6 | 0 | Windows,Prime95,v16,NT service,(aka WS5) | | Factored | 2000-08-17 | James Struble | B3E597EBE70DE7E6 | 4268146 | Windows,Prime95,v19,(aka WV1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-04-01 | Perig | 2D29BB49A97DDBAD | 1 | 2291666 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-04-01 | minimal_subset | CERT | Proof certified good | | 2025-04-01 | Perig | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-03-27 | Andrey Dobrynin | F-ECM | Factor: 38872956607011936948983 / ECM curve 8, B1=50000, B2=45039225, Edwards Sigma=397874377508467 | | 2022-09-12 | Sid & Andy | NF-PM1 | B1=8000000, B2=6410980290 | | 2021-09-17 | SRBase | NF | no factor TF: 71-72 | | 2021-08-26 | SRBase | NF | no factor TF: 70-71 | | 2021-08-18 | SRBase | NF | no factor TF: 69-70 | | 2020-08-24 | TJAOI | NF | no factor TF: 68-69 | | 2020-06-14 | King | NF-PM1 | B1=1000000, B2=22500000 | | 2018-07-05 | ramgeis | NF | no factor TF: 67-68 | | 2016-07-17 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-30 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-07 | monst | NF | no factor TF: 64-65 | | 2014-12-06 | Nesowa | NF | no factor TF: 63-64 | | 2009-04-28 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2008-11-04 | Jayson King | NF-PM1 | B1=70000, B2=1400000, E=6 | | 2000-08-17 | -anonymous- | C-LL | B3E597EBE70DE7E6 | | 1999-05-09 | vidmar | C-LL | B3E597EBE70DE7E6 | | 1999-03-26 | -anonymous- | C-LL | 7178BF0D826B3C__ | | 1998-04-11 | -anonymous- | NF | no factor TF: 1-62 |
|
