| 5126543 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 47 / 280 |
Estimated T-Level: 20.8 ⓘ TF below 2^64 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | David A McGough | CE60B56C933A08B5 | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | 2000-06-11 | Ing. Pavel PaJaSoft Janousek | CE60B56C933A08B5 | 3748610 | Linux 32-bit,Prime95,v20,(aka WW2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-09 | jeriffee | E8967F4848093879 | 1 | 3398914 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-09 | benthomas | CERT | Proof certified good | | 2025-01-09 | jeriffee | C-PRP | M5126543/2891451254334350827643977 : E8967F4848093879 Proof Certified Good
Proof Power: 7
| | 2025-01-03 | fordobr | F-ECM | Factor: 2891451254334350827643977 / ECM curve 25, B1=50000, B2=27023535, Edwards Sigma=3138581325491903 | | 2024-09-14 | Andrew B | NF | no factor TF: 71-72 | | 2022-06-24 | Sid & Andy | NF-PM1 | B1=4000000, B2=10301320260 | | 2022-01-14 | mikr | NF | no factor TF: 70-71 | | 2020-12-15 | -anonymous- | NF | no factor TF: 69-70 | | 2020-11-09 | TJAOI | NF | no factor TF: 68-69 | | 2019-01-30 | King | NF-PM1 | B1=750000, B2=17500000 | | 2018-06-20 | ramgeis | NF | no factor TF: 67-68 | | 2016-05-22 | Gordon Spence | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 1-61 | | 2015-08-06 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-15 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-15 | VictordeHollander | NF | no factor TF: 63-64 | | 2009-09-26 | S485122 | NF | no factor TF: 62-63 | | 2009-09-08 | USAFSS | NF-PM1 | B1=60000, B2=1065000, E=6 | | 2008-12-28 | Sturle Sunde | NF | no factor TF: 61-62 | | 2000-06-11 | PaJaSoft | C-LL | CE60B56C933A08B5 | | 2000-05-10 | PaJaSoft | NF-PM1 | B1=20000, B2=20000 |
|
