| 2803 | Composite, with 2 known prime factors. 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 | 17193 / 40830 |
Estimated T-Level: 52.1 ⓘ TF below 2^168 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 | 4BB902056D98E8BE | 2 | 0 | 1 | 3 | | Verified | No proof (small exponent) | 2017-10-12 | kkmrkkblmbrbk | 4BB902056D98E8BE | 2 | 1006 | 1 | 3 | | Verified | No proof (small exponent) | 2020-04-17 | Oliver Kruse | 38789C34811A0AF9 | 2 | 1529 | 5 | 3 | | Verified | No proof (small exponent) | 2024-02-03 | Wentao Huang | 38789C34811A0AF9 | 2 | 2050 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-04-15 | masser | NF-PP1 | Start=175/53, B1=4300000000, B2=4295700000000 | | 2024-02-03 | Wentao Huang | C-PRP | M2803/7492363483783/76636707471553 : 38789C34811A0AF9 | | 2022-02-16 | mikr | NF-PM1 | B1=60000000000, B2=314806422904433460 | | 2021-07-06 | ViliamF | NF-PM1 | B1=1000000000, B2=191000000000 | | 2020-04-17 | Oliver Kruse | C-PRP | M2803/7492363483783/76636707471553 : 38789C34811A0AF9 | | 2017-10-12 | kkmrkkblmbrbk | C-PRP | M2803/7492363483783/76636707471553 : 4BB902056D98E8BE | | 2017-09-21 | Oliver Kruse | C-PRP | M2803/7492363483783/76636707471553 : 4BB902056D98E8BE | | 2017-09-21 | Oliver Kruse | C-PRP | M2803/7492363483783/76636707471553 : 4BB902056D98E8BE | | 1999-03-26 | -anonymous- | F-PM1 | Factor: 76636707471553 |
|
