| 1493749 | Composite, with 3 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 261 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 107 / 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 | 8380AD47F0869A34 | 0 | 1 | 3 |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2017-10-01 | Oliver Kruse | 916AA90C3601849D | 2 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-10-28 | kkmrkkblmbrbk | 916AA90C3601849D | 2 | 989228 | 1 | 3 | | Verified | PRP without proof (not generated) | 2017-11-27 | kkmrkkblmbrbk | 8380AD47F0869A34 | 3 | 193436 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-11-27 | storm5510 | 8380AD47F0869A34 | 3 | 1477329 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-09-03 | Carlos Pinho | CERT | Proof certified good | | 2025-09-01 | Kriesel | C-PRP | 8380AD47F0869A34 Proof Certified Good
Proof Power: 6
| | 2017-11-27 | storm5510 | C-PRP | M1493749/140412407/32005641044877583/238374350524307004641 : 8380AD47F0869A34 | | 2017-11-27 | kkmrkkblmbrbk | C-PRP | M1493749/140412407/32005641044877583/238374350524307004641 : 8380AD47F0869A34 | | 2017-11-26 | Oliver Kruse | F-ECM | Factor: 238374350524307004641 | | 2017-10-28 | kkmrkkblmbrbk | C-PRP | M1493749/140412407/32005641044877583 : 916AA90C3601849D | | 2017-10-01 | Oliver Kruse | C-PRP | M1493749/140412407/32005641044877583 : 916AA90C3601849D | | 2016-03-17 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2014-12-17 | TJAOI | F | Factor: 32005641044877583 |
|
