| 8402221 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 268 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 1 / 280 |
Estimated T-Level: 20.0 ⓘ TF below 2^61 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1999-12-15 | Sven Kiontke | 8F17B32CEE810127 | 4600249 | Linux 32-bit,Prime95,v19,(aka WV2) | | Factored | 2002-11-16 | Ars Technica Team Prime Rib | 8F17B32CEE810127 | 920551 | Windows,Prime95,v21,NT service,(aka WX5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2018-10-23 | storm5510 | ECBBEE66E7206315 | 1 | 6492914 | 5 | 3 | | Verified | PRP without proof (not generated) | 2020-05-19 | marssystems | ECBBEE66E7206315 | 1 | 541057 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-22 | beep | NF-PM1 | B1=1800000, B2=8622634020 | | 2020-05-19 | marssystems | C-PRP | M8402221/1365983224224467501647 : ECBBEE66E7206315 | | 2018-10-23 | storm5510 | C-PRP | M8402221/1365983224224467501647 : ECBBEE66E7206315 | | 2013-06-05 | swildner | F-ECM | Factor: 1365983224224467501647 | | 2012-06-25 | bcp19 | NF-PM1 | B1=100000, B2=1825000, E=6 | | 2002-11-16 | Team Prime Rib | C-LL | 8F17B32CEE810127 | | 2002-10-26 | Team Prime Rib | NF-PM1 | B1=40000, B2=400000 | | 2002-10-26 | Team Prime Rib | NF | no factor TF: 1-64 | | 1999-12-15 | -anonymous- | C-LL | 8F17B32CEE810127 | | 1998-10-29 | -anonymous- | NF | no factor TF: 1-63 | | 1998-10-11 | timesau | NF | no factor TF: 1-62 | | 1998-09-20 | -anonymous- | NF | no factor TF: 1-61 |
|
