| 2399519 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 144 / 640 |
Estimated T-Level: 26.1 ⓘ 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 |
|---|
| Factored | PRP without proof (not generated) | 2017-10-12 | Oliver Kruse | 25079255669651B0 | 1 | 982678 | 5 | 3 | | Factored | PRP without proof (not generated) | 2017-11-26 | ATH | 25079255669651B0 | 1 | 1860534 | 5 | 3 | | Verified | Certified Good | 2025-03-05 | Anton Tsvetkov | 25079255669651B0 | 2 | 1383297 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-05 | John Airey | CERT | Proof certified good | | 2025-03-05 | Anton Tsvetkov | C-PRP | M2399519/217631574263/21020431760434588689089 : 25079255669651B0 Proof Certified Good
Proof Power: 7
| | 2025-03-05 | Anton Tsvetkov | F-ECM | Factor: 21020431760434588689089 / ECM curve 46, B1=71796, B2=26541480, Edwards Sigma=392637924991441 | | 2018-09-28 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-11-26 | ATH | C-PRP | M2399519/217631574263 : 25079255669651B0 | | 2017-10-12 | Oliver Kruse | C-PRP | M2399519/217631574263 : 25079255669651B0 |
|
