| 3389 | 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 | 14277 / 40830 |
Estimated T-Level: 51.7 ⓘ 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 | 2CA738496301168E | 1 | 0 | 1 | 3 | | Verified | No proof (small exponent) | 2017-10-12 | kkmrkkblmbrbk | 2CA738496301168E | 1 | 75 | 1 | 3 | | Verified | No proof (small exponent) | 2020-04-17 | Oliver Kruse | 6580487EEEE9A516 | 1 | 2649 | 5 | 3 | | Verified | No proof (small exponent) | 2024-02-03 | Wentao Huang | 6580487EEEE9A516 | 1 | 242 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-04-28 | masser | NF-PP1 | Start=139/53, B1=3100000000, B2=3096900000000 | | 2024-02-03 | Wentao Huang | C-PRP | M3389/13306601636962715561 : 6580487EEEE9A516 | | 2022-04-27 | mikr | NF-PM1 | B1=90000000000, B2=353940654665928330 | | 2021-07-10 | ViliamF | NF-PM1 | B1=1000000000, B2=193000000000 | | 2020-04-17 | Oliver Kruse | C-PRP | M3389/13306601636962715561 : 6580487EEEE9A516 | | 2017-10-12 | kkmrkkblmbrbk | C-PRP | M3389/13306601636962715561 : 2CA738496301168E | | 2017-09-21 | Oliver Kruse | C-PRP | M3389/13306601636962715561 : 2CA738496301168E | | 2017-09-21 | Oliver Kruse | C-PRP | M3389/13306601636962715561 : 2CA738496301168E |
|
