| 5156803 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 89 / 280 |
Estimated T-Level: 21.6 ⓘ TF below 2^67 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | David A McGough | 14CE20FDEF293AE7 | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | 2000-06-11 | Link Ster | 14CE20FDEF293AE7 | 4215907 | Windows,Prime95,v19,(aka WV1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-16 | mrh | ACBB949757F4AEB8 | 1 | 4557809 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-16 | Cong Shengzhuo | CERT | Proof certified good | | 2025-01-16 | mrh | C-PRP | M5156803/872524348034782542083753 : ACBB949757F4AEB8 Proof Certified Good
Proof Power: 7
| | 2025-01-10 | fordobr | F-ECM | Factor: 872524348034782542083753 / ECM curve 36, B1=50000, B2=117709515, Edwards Sigma=5763873995150719 | | 2024-10-18 | Andrew B | NF | no factor TF: 71-72 | | 2022-07-05 | Sid & Andy | NF-PM1 | B1=4000000, B2=9110873310 | | 2022-01-23 | mikr | NF | no factor TF: 70-71 | | 2021-11-18 | TJAOI | NF | no factor TF: 69-70 | | 2020-11-30 | TJAOI | NF | no factor TF: 68-69 | | 2018-06-20 | ramgeis | NF | no factor TF: 67-68 | | 2017-02-21 | Squeeky_Squirrel | NF-PM1 | B1=310000, B2=9687500, E=12 | | 2016-06-01 | Gordon Spence | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 1-61 | | 2015-08-07 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-17 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-17 | VictordeHollander | NF | no factor TF: 63-64 | | 2009-09-28 | USAFSS | NF-PM1 | B1=55000, B2=935000, E=6 | | 2009-06-24 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2008-10-12 | Sturle Sunde | NF | no factor TF: 61-62 | | 2000-06-11 | -anonymous- | C-LL | 14CE20FDEF293AE7 |
|
