| 1319389 | Composite, with 4 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 260 |
| Factored | |
| P-1 factors | |
| 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 | 23158CD3734E0C7D | 0 | 1 | 3 |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2017-10-05 | Oliver Kruse | B9B7E098470AE1B2 | 3 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-10-22 | nokno | B9B7E098470AE1B2 | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-04 | kkmrkkblmbrbk | B9B7E098470AE1B2 | 3 | 395735 | 1 | 3 | | Verified | PRP without proof (not generated) | 2018-06-10 | Daniil Tsarkov | 23158CD3734E0C7D | 4 | 1245097 | 5 | 3 | | Verified | PRP without proof (not generated) | 2018-06-15 | Gabriel Lignelli | 23158CD3734E0C7D | 4 | 763617 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-09-03 | Benjamin Michaelis | CERT | Proof certified good | | 2025-09-01 | Kriesel | C-PRP | 23158CD3734E0C7D Proof Certified Good
Proof Power: 6
| | 2018-06-15 | Gabriel Lignelli | C-PRP | M1319389/92357231/8410025614799/20366929758824205735553/10853416182215113629608915791 : 23158CD3734E0C7D | | 2018-06-10 | Daniil Tsarkov | C-PRP | M1319389/92357231/8410025614799/20366929758824205735553/10853416182215113629608915791 : 23158CD3734E0C7D | | 2018-06-08 | TJAOI | F-ECM | Factor: 10853416182215113629608915791 | | 2017-11-04 | kkmrkkblmbrbk | C-PRP | M1319389/92357231/8410025614799/20366929758824205735553 : B9B7E098470AE1B2 | | 2017-10-22 | nokno | C-PRP | M1319389/known_factors : B9B7E098470AE1B2 | | 2017-10-05 | Oliver Kruse | C-PRP | M1319389/92357231/8410025614799/20366929758824205735553 : B9B7E098470AE1B2 | | 2017-09-30 | Oliver Kruse | C-PRP | M1319389/92357231/8410025614799/20366929758824205735553 : B9B7E098470AE1B2 | | 2015-01-21 | alpertron | F-PM1 | Factor: 20366929758824205735553 / B1=500000, B2=15000000 | | 2008-07-15 | J Feitsma | F | Factor: 8410025614799 |
|
