| 2089 | 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 | 40830 / 40830 | | 60 | 260000000 | 64581 / 105362 |
Estimated T-Level: 58.1 ⓘ TF below 2^188 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 | BBA6886CDF27A1C8 | 1 | 0 | 1 | 3 | | Verified | No proof (small exponent) | 2017-10-12 | kkmrkkblmbrbk | BBA6886CDF27A1C8 | 1 | 1668 | 1 | 3 | | Verified | No proof (small exponent) | 2020-04-17 | Oliver Kruse | 91239E8ECB28A857 | 1 | 245 | 5 | 3 | | Verified | No proof (small exponent) | 2024-01-27 | Wentao Huang | 91239E8ECB28A857 | 1 | 1875 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-31 | masser | NF-PP1 | Start=104/53, B1=5300000000, B2=5294700000000 | | 2024-04-20 | masser | NF-PM1 | B1=100000000000, B2=153753062580387270 | | 2024-01-27 | Wentao Huang | C-PRP | M2089/16673027617 : 91239E8ECB28A857 | | 2020-04-17 | Oliver Kruse | C-PRP | M2089/16673027617 : 91239E8ECB28A857 | | 2017-10-12 | kkmrkkblmbrbk | C-PRP | M2089/16673027617 : BBA6886CDF27A1C8 | | 2017-09-21 | Oliver Kruse | C-PRP | M2089/16673027617 : BBA6886CDF27A1C8 | | 2017-09-21 | Oliver Kruse | C-PRP | M2089/16673027617 : BBA6886CDF27A1C8 | | 2016-09-08 | kkmrkkblmbrbk | NF-PM1 | B1=500000000, B2=50000000000, E=12 |
|
