| 9721 | 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 | 6912 / 16550 |
Estimated T-Level: 47.1 ⓘ TF below 2^151 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 | D5DE2C60D1D59BA0 | 1 | 0 | 1 | 3 | | Verified | No proof (small exponent) | 2017-10-12 | kkmrkkblmbrbk | D5DE2C60D1D59BA0 | 1 | 2646 | 1 | 3 | | Verified | No proof (small exponent) | 2020-04-17 | Oliver Kruse | A21123E5A7DC5B37 | 1 | 8183 | 5 | 3 | | Verified | No proof (small exponent) | 2024-07-01 | kkmrkkblmbrbk | A21123E5A7DC5B37 | 1 | 7195 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-26 | masser | NF-PP1 | Start=113/61, B1=1000000000, B2=999000000000 | | 2024-07-01 | kkmrkkblmbrbk | C-PRP | M9721/14144348109786497832711164593 : A21123E5A7DC5B37 | | 2023-06-18 | JacobZ | NF-PM1 | B1=59000000000, B2=250256095608669150 | | 2022-02-03 | -anonymous- | NF-PM1 | B1=50000, B2=15277839797220 | | 2020-04-17 | Oliver Kruse | C-PRP | M9721/14144348109786497832711164593 : A21123E5A7DC5B37 | | 2017-10-12 | kkmrkkblmbrbk | C-PRP | M9721/14144348109786497832711164593 : D5DE2C60D1D59BA0 | | 2017-09-21 | Oliver Kruse | C-PRP | M9721/14144348109786497832711164593 : D5DE2C60D1D59BA0 | | 2017-09-21 | Oliver Kruse | C-PRP | M9721/14144348109786497832711164593 : D5DE2C60D1D59BA0 |
|
