| 1249319 | Composite, with 3 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 260 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 104 / 640 |
Estimated T-Level: 25.8 ⓘ TF below 2^81 is very unlikely to find new factors due to ECM effort. |
| PRP | | Status | Proof | Date | User | Residue | Shift | Type | Base |
|---|
| Factored | Certified Good Power=6 | 2025-09-01 | Kriesel | 743CCFAED10CB62C | 0 | 1 | 3 |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2017-09-29 | Oliver Kruse | 86102C2372192FC9 | 2 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-10-20 | kkmrkkblmbrbk | 86102C2372192FC9 | 2 | 1058409 | 1 | 3 | | Verified | PRP without proof (not generated) | 2017-12-02 | kkmrkkblmbrbk | 743CCFAED10CB62C | 3 | 136258 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-02 | storm5510 | 743CCFAED10CB62C | 3 | 252885 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-09-02 | ccat2002 | CERT | Proof certified good | | 2025-09-01 | Kriesel | C-PRP | 743CCFAED10CB62C Proof Certified Good
Proof Power: 6
| | 2017-12-02 | storm5510 | C-PRP | M1249319/9994553/149918281/11311930753059530525663 : 743CCFAED10CB62C | | 2017-12-02 | kkmrkkblmbrbk | C-PRP | M1249319/9994553/149918281/11311930753059530525663 : 743CCFAED10CB62C | | 2017-12-01 | TJAOI | F-ECM | Factor: 11311930753059530525663 | | 2017-10-20 | kkmrkkblmbrbk | C-PRP | M1249319/9994553/149918281 : 86102C2372192FC9 | | 2017-09-29 | Oliver Kruse | C-PRP | M1249319/9994553/149918281 : 86102C2372192FC9 | | 2016-03-17 | alpertron | NF-PM1 | B1=300000, B2=10000000, E=12 | | 2008-07-15 | J Feitsma | F | Factor: 149918281 |
|
