| 7207687 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 269 TF target 267 |
| Factored | |
| P-1 factors | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 6 / 280 |
Estimated T-Level: 20.1 ⓘ TF below 2^62 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1999-08-22 | John Galt | BBE0577B034583CF | 5501361 | Windows,Prime95,v18,(aka WU1) | | Factored | 2002-05-05 | Ars Technica Team Prime Rib | BBE0577B034583CF | 5572725 | Windows,Prime95,v21,NT service,(aka WX5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2020-04-17 | ATH | 1BD63E9E7E927DAC | 1 | 5518639 | 5 | 3 | | Factored | PRP without proof (not generated) | 2020-04-19 | Wentao Huang | 1BD63E9E7E927DAC | 1 | 5820253 | 5 | 3 | | Verified | Certified Good | 2025-10-11 | Gnarwhals | 1BD63E9E7E927DAC | 2 | 6498529 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-10-11 | Ryan Propper | CERT | Proof certified good | | 2025-10-11 | Gnarwhals | C-PRP | M7207687/387391133821393942567/66796944043258640151201641 : 1BD63E9E7E927DAC Proof Certified Good
Proof Power: 8
| | 2025-10-05 | Sid & Andy | F-PM1 | Factor: 66796944043258640151201641 / B1=2600000, B2=4263252840 | | 2020-04-19 | Wentao Huang | C-PRP | M7207687/387391133821393942567 : 1BD63E9E7E927DAC | | 2020-04-17 | ATH | C-PRP | M7207687/387391133821393942567 : 1BD63E9E7E927DAC | | 2020-04-17 | TJAOI | F | Factor: 387391133821393942567 / TF: 68-69 | | 2020-03-22 | Dylan Delgado | NF-PM1 | B1=200000, B2=6000000, E=12 | | 2018-07-22 | ramgeis | NF | no factor TF: 67-68 | | 2016-10-13 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-06-12 | VictordeHollander | NF | no factor TF: 65-66 | | 2013-11-10 | David Campeau | NF | no factor TF: 64-65 | | 2012-07-23 | Squeeky_Squirrel | NF-PM1 | B1=130000, B2=2437500, E=6 | | 2012-03-06 | David Campeau | NF | no factor TF: 63-64 | | 2002-05-05 | Team Prime Rib | C-LL | BBE0577B034583CF | | 2002-01-22 | -anonymous- | NF-PM1 | B1=30000, B2=210000 | | 2001-12-08 | -anonymous- | NF | no factor TF: 1-63 | | 1999-08-22 | -anonymous- | C-LL | BBE0577B034583CF | | 1998-07-29 | -anonymous- | NF | no factor TF: 1-62 | | 1998-07-11 | -anonymous- | NF | no factor TF: 1-61 |
|
