| 2268517 | Composite, with 3 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 152 / 640 |
Estimated T-Level: 26.2 ⓘ TF below 2^82 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 | PRP without proof (not generated) | 2017-10-11 | Oliver Kruse | ED807C9AD33E8EDD | 3 | 0 | 1 | 3 | | Verified | PRP without proof (not generated) | 2017-11-21 | storm5510 | ED807C9AD33E8EDD | 3 | 1674040 | 1 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2017-11-21 | storm5510 | C-PRP | M2268517/721388407/122604269783/17258600576927 : ED807C9AD33E8EDD | | 2017-10-11 | Oliver Kruse | C-PRP | M2268517/721388407/122604269783/17258600576927 : ED807C9AD33E8EDD | | 2016-04-25 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2008-09-30 | markr | F | Factor: 17258600576927 | | 2008-07-14 | George Woltman | F-ECM | Factor: 122604269783 |
|
