| 2640947 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 106 / 280 |
Estimated T-Level: 21.9 ⓘ TF below 2^68 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 |
|---|
| Factored | PRP without proof (not generated) | 2017-10-18 | Oliver Kruse | DC2F309A5284AA57 | 1 | 1840153 | 5 | 3 | | Factored | PRP without proof (not generated) | 2017-12-02 | storm5510 | DC2F309A5284AA57 | 1 | 715476 | 5 | 3 | | Verified | Certified Good | 2022-08-21 | LordJulius | DC2F309A5284AA57 | 2 | 1915583 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-08-21 | daekaz | CERT | Proof certified good | | 2022-08-21 | LordJulius | C-PRP | M2640947/6465038257/203283028693200703393 : DC2F309A5284AA57 Proof Certified Good
Proof Power: 7
| | 2022-08-19 | TJAOI | F | Factor: 203283028693200703393 | | 2019-07-04 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-12-02 | storm5510 | C-PRP | M2640947/6465038257 : DC2F309A5284AA57 | | 2017-10-18 | Oliver Kruse | C-PRP | M2640947/6465038257 : DC2F309A5284AA57 |
|
