| 5390893 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 55 / 280 |
Estimated T-Level: 21.0 ⓘ TF below 2^65 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-08-24 | Stephen Wood | 87033E6B21D9513F | 0 | Linux 32-bit,Prime95,v16,(aka WS2) | | Factored | 2000-11-15 | Pat Lett | 87033E6B21D9513F | 2168197 | Windows,Prime95,v18,(aka WU1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-13 | ATH | 79126B1D376CA39D | 1 | 114475 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-13 | Chun sung soo | CERT | Proof certified good | | 2025-03-13 | ATH | C-PRP | M5390893/1961214019725338715620057 : 79126B1D376CA39D Proof Certified Good
Proof Power: 7
| | 2025-03-08 | fordobr | F-ECM | Factor: 1961214019725338715620057 / ECM curve 24, B1=50000, B2=64857975, Edwards Sigma=4007942953367598 | | 2024-03-04 | riccardo uberti | NF | no factor TF: 71-72 | | 2022-09-10 | Sid & Andy | NF-PM1 | B1=4000000, B2=10285831710 | | 2022-02-28 | mikr | NF | no factor TF: 70-71 | | 2021-11-25 | TJAOI | NF | no factor TF: 69-70 | | 2020-04-21 | King | NF-PM1 | B1=1000000, B2=22500000 | | 2019-09-26 | lycorn | NF | no factor TF: 68-69 | | 2019-07-08 | Ivan M | NF-PM1 | B1=85000, B2=1211250 | | 2018-06-19 | ramgeis | NF | no factor TF: 67-68 | | 2016-08-13 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-20 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-25 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-25 | VictordeHollander | NF | no factor TF: 63-64 | | 2010-10-11 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=960000, E=6 | | 2009-05-16 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-11-15 | lettp | C-LL | 87033E6B21D9513F | | 2000-06-29 | -anonymous- | NF-PM1 | B1=25000, B2=268750 | | 2000-06-26 | -anonymous- | NF-PM1 | B1=25000, B2=268750 | | 1999-01-29 | -anonymous- | NF | no factor TF: 1-62 | | 1998-11-07 | -anonymous- | NF | no factor TF: 1-62 | | 1998-08-24 | Stephen Wood | C-LL | 87033E6B21D9513F | | 1998-03-31 | -anonymous- | NF | no factor TF: 1-62 |
|
