| 6571921 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 267 |
| Factored | |
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-12-28 | Oliver Kruse | B31DDE5FB0139B2F | 1 | 1614007 | 5 | 3 | | Verified | PRP without proof (not generated) | 2018-10-26 | storm5510 | B31DDE5FB0139B2F | 1 | 6479167 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-24 | Stef42 | NF-PM1 | B1=2281000, B2=5370946350 | | 2023-12-07 | Stef42 | NF-PM1 | B1=109000, B2=124105800 | | 2018-10-26 | storm5510 | C-PRP | M6571921/406472144048063 : B31DDE5FB0139B2F | | 2017-12-28 | Oliver Kruse | C-PRP | M6571921/406472144048063 : B31DDE5FB0139B2F |
|
