| 8328611 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 268 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 3 / 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 | 1999-10-15 | Goede Schueler/Christoph Steinbeck | 9CB6DE51D045B0C6 | 3182225 | Windows,Prime95,v18,NT service,(aka WU5) | | Factored | 2002-11-16 | Ars Technica Team Prime Rib | 9CB6DE51D045B0C6 | 4507747 | Windows,Prime95,v22,(aka WY1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2018-10-11 | ATH | 2CF0068EB55CE61F | 1 | 1359792 | 5 | 3 | | Verified | PRP without proof (not generated) | 2020-04-23 | oodaira | 2CF0068EB55CE61F | 1 | 2605274 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-14 | beep | NF-PM1 | B1=1750000, B2=6798611820 | | 2020-04-23 | oodaira | C-PRP | M8328611/49705543529055860393 : 2CF0068EB55CE61F | | 2018-10-11 | ATH | C-PRP | M8328611/49705543529055860393 : 2CF0068EB55CE61F | | 2015-05-28 | VictordeHollander | F | Factor: 49705543529055860393 / TF: 65-66 | | 2014-03-12 | lycorn | NF | no factor TF: 64-65 | | 2012-08-01 | firejuggler | NF-PM1 | B1=95000, B2=1662500, E=6 | | 2004-03-26 | Sturle Sunde | NF | no factor TF: 1-64 | | 2002-11-16 | Team Prime Rib | C-LL | 9CB6DE51D045B0C6 | | 2002-11-09 | Team Prime Rib | NF-PM1 | B1=50000, B2=787500 | | 1999-10-15 | -anonymous- | C-LL | 9CB6DE51D045B0C6 | | 1999-03-26 | -anonymous- | NF | no factor TF: 1-63 | | 1998-09-13 | -anonymous- | NF | no factor TF: 1-62 | | 1998-09-06 | Mark D | NF | no factor TF: 1-61 |
|
