| 1273033 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 260 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 100 / 640 |
Estimated T-Level: 25.8 ⓘ TF below 2^81 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Vincent J. Mooney | 2130C4254762332F | 0 | Windows 16-bit,Prime95,v11,(aka WB) | | Factored | | Simon Burge | 2130C4254762332F | 0 | Crandall,(aka X) | | Factored | | Brian J. Beesley | 2130C4254762332F | 190964 | Linux 32-bit,Prime95,v24 final,(aka Wc2) | | Factored | 2016-06-01 | MadPoo 🙂 | 2130C4254762332F | 797323 | Windows 64-bit,Prime95,v26,(aka We4) |
|
| PRP | | Status | Proof | Date | User | Residue | Shift | Type | Base |
|---|
| Factored | Certified Good Power=6 | 2025-09-01 | Kriesel | C52D0141F7120859 | 0 | 1 | 3 |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-12-01 | storm5510 | C52D0141F7120859 | 1 | 305772 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-02 | kkmrkkblmbrbk | C52D0141F7120859 | 1 | 1208195 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-09-02 | MarktheDip | CERT | Proof certified good | | 2025-09-01 | Kriesel | C-PRP | C52D0141F7120859 Proof Certified Good
Proof Power: 6
| | 2017-12-02 | kkmrkkblmbrbk | C-PRP | M1273033/245084064419612657303479 : C52D0141F7120859 | | 2017-12-01 | storm5510 | C-PRP | M1273033/245084064419612657303479 : C52D0141F7120859 | | 2017-12-01 | TJAOI | F-ECM | Factor: 245084064419612657303479 | | 2016-08-27 | Bruno Victal | NF-PM1 | B1=2500000, B2=62500000, E=12 | | 2016-08-03 | Bruno Victal | NF-PM1 | B1=2500000, B2=62500000, E=12 | | 2016-06-01 | MadPoo 🙂 | C-LL | 2130C4254762332F | | 2016-02-23 | Mark Rose | NF | no factor TF: 58-60 | | 2015-09-24 | ramgeis | NF | no factor TF: 65-66 | | 2015-04-11 | monst | NF | no factor TF: 64-65 | | 2015-04-10 | omylist | NF | no factor TF: 63-64 | | 2013-10-07 | David Campeau | NF-PM1 | B1=1195000, B2=34655000, E=12 | | 2012-10-18 | dbaugh | NF | no factor TF: 62-63 | | 2012-09-15 | Axelsson | NF | no factor TF: 61-62 | | 2009-02-16 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-06-17 | -anonymous- | NF | no factor TF: 1-58 | | 2003-06-06 | -anonymous- | NF | no factor TF: 1-58 | | 2003-02-24 | -anonymous- | NF-PM1 | B1=2048, B2=204800, E=12 | | 2001-11-10 | -anonymous- | NF | no factor TF: 1-57 | | 1999-07-27 | -anonymous- | NF | no factor TF: 1-56 |
|
