| 2609 | Composite, with 4 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 | 9422 / 40830 |
Estimated T-Level: 51.2 ⓘ TF below 2^165 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 | 2CF064F40A07D0D4 | 4 | 0 | 1 | 3 | | Verified | No proof (small exponent) | 2017-10-02 | kkmrkkblmbrbk | 2CF064F40A07D0D4 | 4 | 0 | 1 | 3 | | Verified | No proof (small exponent) | 2017-12-07 | ATH | 2CF064F40A07D0D4 | 4 | 451 | 1 | 3 | | Verified | No proof (small exponent) | 2020-04-17 | Oliver Kruse | C73D32E1AD834FC4 | 4 | 2340 | 5 | 3 | | Verified | No proof (small exponent) | 2024-02-03 | Wentao Huang | C73D32E1AD834FC4 | 4 | 596 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-04-09 | masser | NF-PP1 | Start=156/41, B1=4300000000, B2=4295700000000 | | 2024-05-28 | masser | NF-PM1 | B1=100000000000, B2=126882090315080100 | | 2024-02-03 | Wentao Huang | C-PRP | M2609/36527/7404343/18227204521/2835015782843620889164140409993 : C73D32E1AD834FC4 | | 2021-07-05 | ViliamF | NF-PM1 | B1=1000000000, B2=191000000000 | | 2020-04-17 | Oliver Kruse | C-PRP | M2609/36527/7404343/18227204521/2835015782843620889164140409993 : C73D32E1AD834FC4 | | 2017-12-07 | ATH | C-PRP | M2609/36527/7404343/18227204521/2835015782843620889164140409993 : 2CF064F40A07D0D4 | | 2017-10-02 | kkmrkkblmbrbk | C-PRP | M2609/36527/7404343/18227204521/2835015782843620889164140409993 : 2CF064F40A07D0D4 | | 2017-09-21 | Oliver Kruse | C-PRP | M2609/known_factors : 2CF064F40A07D0D4 |
|
