| 9209 | 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 | 5559 / 16550 |
Estimated T-Level: 46.7 ⓘ TF below 2^150 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Unknown | 7B5E | 0 | Unknown,(aka U) | | Factored | | George Woltman | 8504B2CCF5047B5E | 0 | Woltman,Prime95,first web release,(aka W4) | | Factored | | Brian J. Beesley | 8504B2CCF5047B5E | 0 | Mac,John Sweeney,v1.4,(aka J3) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | No proof (small exponent) | 2017-09-21 | Oliver Kruse | 9A607B8572CC677B | 1 | 0 | 1 | 3 | | Verified | No proof (small exponent) | 2017-10-02 | kkmrkkblmbrbk | 9A607B8572CC677B | 1 | 0 | 1 | 3 | | Verified | No proof (small exponent) | 2017-12-07 | ATH | 9A607B8572CC677B | 1 | 5949 | 1 | 3 | | Verified | No proof (small exponent) | 2020-04-17 | Oliver Kruse | 92303B83BBD8740A | 1 | 6348 | 5 | 3 | | Verified | No proof (small exponent) | 2024-07-01 | kkmrkkblmbrbk | 92303B83BBD8740A | 1 | 8259 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-04-10 | masser | NF-PP1 | Start=191/13, B1=1000000000, B2=999000000000 | | 2024-07-01 | kkmrkkblmbrbk | C-PRP | M9209/1821133994357721169773431211508950567060217 : 92303B83BBD8740A | | 2023-07-11 | JacobZ | NF-PM1 | B1=63000000000, B2=255469764292442700 | | 2020-04-17 | Oliver Kruse | C-PRP | M9209/1821133994357721169773431211508950567060217 : 92303B83BBD8740A | | 2017-12-07 | ATH | C-PRP | M9209/1821133994357721169773431211508950567060217 : 9A607B8572CC677B | | 2017-10-02 | kkmrkkblmbrbk | C-PRP | M9209/1821133994357721169773431211508950567060217 : 9A607B8572CC677B | | 2017-09-21 | Oliver Kruse | C-PRP | M9209/known_factors : 9A607B8572CC677B | | 2009-01-25 | -anonymous- | F-ECM | Factor: 1821133994357721169773431211508950567060217 | | 2003-03-16 | -anonymous- | NF-PM1 | B1=4290000000 | | 2002-12-09 | -anonymous- | NF | no factor TF: 1-57 | | 2002-11-02 | -anonymous- | NF-PM1 | B1=3221225472, B2=4290000000, E=48 | | 2002-08-31 | -anonymous- | NF-PM1 | B1=2147483648, B2=4290000000, E=48 | | 2002-06-15 | -anonymous- | NF-PM1 | B1=1073741824, B2=4290000000, E=48 | | 2001-09-22 | -anonymous- | NF-PM1 | B1=3000000000, B2=4290000000 | | 2001-06-30 | -anonymous- | NF-PM1 | B1=43000000, B2=4290000000 | | 2001-02-11 | -anonymous- | NF-PM1 | B1=1000000, B2=100000000 | | 2000-07-17 | -anonymous- | NF | no factor TF: 1-56 | | 2000-03-01 | -anonymous- | NF | no factor TF: 54-55 | | 1999-12-30 | -anonymous- | NF | no factor TF: 53-54 | | 1999-09-22 | -anonymous- | NF | no factor TF: 52-53 |
|
