| 3331 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 244 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 640 / 640 | | 35 | 1000000 | 1566 / 1566 | | 40 | 3000000 | 4588 / 4588 | | 45 | 11000000 | 9201 / 9201 | | 50 | 44000000 | 16550 / 16550 | | 55 | 110000000 | 14405 / 40830 |
Estimated T-Level: 51.8 ⓘ TF below 2^167 is very unlikely to find new factors due to ECM effort. |
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | No proof (small exponent) | 2017-09-21 | Oliver Kruse | D0B49900A53DAD64 | 1 | 0 | 1 | 3 | | Verified | No proof (small exponent) | 2017-10-12 | kkmrkkblmbrbk | D0B49900A53DAD64 | 1 | 1088 | 1 | 3 | | Verified | No proof (small exponent) | 2020-04-17 | Oliver Kruse | A92688C7455EE505 | 1 | 1705 | 5 | 3 | | Verified | No proof (small exponent) | 2024-02-03 | Wentao Huang | A92688C7455EE505 | 1 | 297 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-04-26 | masser | NF-PP1 | Start=199/61, B1=3100000000, B2=3096900000000 | | 2024-02-03 | Wentao Huang | C-PRP | M3331/1961053495347223343004489751 : A92688C7455EE505 | | 2022-03-22 | mikr | NF-PM1 | B1=80000000000, B2=268799861365815780 | | 2020-04-17 | Oliver Kruse | C-PRP | M3331/1961053495347223343004489751 : A92688C7455EE505 | | 2017-10-12 | kkmrkkblmbrbk | C-PRP | M3331/1961053495347223343004489751 : D0B49900A53DAD64 | | 2017-09-21 | Oliver Kruse | C-PRP | M3331/1961053495347223343004489751 : D0B49900A53DAD64 | | 2017-09-21 | Oliver Kruse | C-PRP | M3331/1961053495347223343004489751 : D0B49900A53DAD64 | | 1998-05-01 | Alex Kruppa | NF | no factor TF: 50-51 | | 1998-05-01 | Alex Kruppa | NF | no factor TF: 49-50 |
|
