| 1377847 | 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 | 105 / 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 | D25F0A5E52D46607 | 0 | 1 | 3 |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2017-09-30 | Oliver Kruse | 3A06B3FE1F295E7F | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-10-24 | kkmrkkblmbrbk | 3A06B3FE1F295E7F | 1 | 797394 | 1 | 3 | | Verified | PRP without proof (not generated) | 2018-12-07 | Oliver Kruse | D25F0A5E52D46607 | 3 | 358864 | 5 | 3 | | Verified | PRP without proof (not generated) | 2018-12-08 | storm5510 | D25F0A5E52D46607 | 3 | 638076 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-09-03 | Carlos Pinho | CERT | Proof certified good | | 2025-09-01 | Kriesel | C-PRP | D25F0A5E52D46607 Proof Certified Good
Proof Power: 6
| | 2018-12-08 | storm5510 | C-PRP | M1377847/24348565390927/552836261423054533936049/152161081350886310668729 : D25F0A5E52D46607 | | 2018-12-07 | Oliver Kruse | C-PRP | M1377847/24348565390927/552836261423054533936049/152161081350886310668729 : D25F0A5E52D46607 | | 2018-12-07 | TJAOI | F-ECM | Factor: 152161081350886310668729 | | 2018-12-07 | TJAOI | F-ECM | Factor: 552836261423054533936049 | | 2017-10-24 | kkmrkkblmbrbk | C-PRP | M1377847/24348565390927 : 3A06B3FE1F295E7F | | 2017-09-30 | Oliver Kruse | C-PRP | M1377847/24348565390927 : 3A06B3FE1F295E7F | | 2016-03-17 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 |
|
