| 7654781 | 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 | 1999-07-04 | Michael Bloink | 8769E9CE1F65659F | 525201 | Windows,Prime95,v18,(aka WU1) | | Factored | 2002-05-05 | Terry S. Arnold | 8769E9CE1F65659F | 4154018 | Windows,Prime95,v21,(aka WX1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2020-05-25 | M Miller | 9881F618A533DCB1 | 1 | 1971600 | 5 | 3 | | Factored | PRP without proof (not generated) | 2020-05-25 | ATH | 9881F618A533DCB1 | 1 | 6941950 | 5 | 3 | | Verified | Certified Good | 2025-10-23 | Michel Yamagishi | 9881F618A533DCB1 | 2 | 7283676 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-10-24 | spica | CERT | Proof certified good | | 2025-10-23 | Michel Yamagishi | C-PRP | M7654781/1872961796815554647281/2272771576770906421350436567 : 9881F618A533DCB1 Proof Certified Good
Proof Power: 8
| | 2025-10-17 | Sid & Andy | F-PM1 | Factor: 2272771576770906421350436567 / B1=2400000, B2=3647339850 | | 2020-05-25 | ATH | C-PRP | M7654781/1872961796815554647281 : 9881F618A533DCB1 | | 2020-05-25 | M Miller | C-PRP | M7654781/1872961796815554647281 : 9881F618A533DCB1 | | 2020-05-23 | GdS | F-PM1 | Factor: 1872961796815554647281 / B1=310809, B2=6216181 | | 2020-03-27 | TJAOI | NF | no factor TF: 68-69 | | 2018-07-31 | ramgeis | NF | no factor TF: 67-68 | | 2016-09-17 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-06-12 | VictordeHollander | NF | no factor TF: 65-66 | | 2013-12-06 | David Campeau | NF | no factor TF: 64-65 | | 2013-10-11 | Nesowa | NF | no factor TF: 63-64 | | 2012-07-30 | Nesowa | NF-PM1 | B1=95000, B2=1757500, E=6 | | 2002-05-05 | -anonymous- | C-LL | 8769E9CE1F65659F | | 2002-03-31 | -anonymous- | NF-PM1 | B1=40000, B2=510000 | | 1999-07-04 | -anonymous- | C-LL | 8769E9CE1F65659F | | 1998-08-24 | -anonymous- | NF | no factor TF: 1-63 | | 1998-08-09 | -anonymous- | NF | no factor TF: 1-62 | | 1998-07-29 | -anonymous- | NF | no factor TF: 1-61 |
|
