| 9521 | 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 | 6754 / 16550 |
Estimated T-Level: 47.0 ⓘ 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 | 4DC51C9919898372 | 2 | 0 | 1 | 3 | | Verified | No proof (small exponent) | 2017-10-02 | kkmrkkblmbrbk | 4DC51C9919898372 | 2 | 0 | 1 | 3 | | Verified | No proof (small exponent) | 2017-12-07 | ATH | 4DC51C9919898372 | 2 | 2647 | 1 | 3 | | Verified | No proof (small exponent) | 2020-04-17 | Oliver Kruse | B898F62CDEA2123E | 2 | 5046 | 5 | 3 | | Verified | No proof (small exponent) | 2024-07-01 | kkmrkkblmbrbk | B898F62CDEA2123E | 2 | 3740 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-31 | masser | NF-PP1 | Start=189/37, B1=1000000000, B2=999000000000 | | 2024-07-01 | kkmrkkblmbrbk | C-PRP | M9521/2935942905394292585908884339571206271/361799 : B898F62CDEA2123E | | 2023-06-27 | JacobZ | NF-PM1 | B1=61000000000, B2=254995794420917550 | | 2022-01-03 | ANONYMOUS | NF-PM1 | B1=100000000 | | 2020-04-17 | Oliver Kruse | C-PRP | M9521/361799/2935942905394292585908884339571206271 : B898F62CDEA2123E | | 2017-12-07 | ATH | C-PRP | M9521/361799/2935942905394292585908884339571206271 : 4DC51C9919898372 | | 2017-10-02 | kkmrkkblmbrbk | C-PRP | M9521/361799/2935942905394292585908884339571206271 : 4DC51C9919898372 | | 2017-09-21 | Oliver Kruse | C-PRP | M9521/known_factors : 4DC51C9919898372 |
|
