| 2557169 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 106 / 280 |
Estimated T-Level: 21.9 ⓘ TF below 2^68 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Szymon Krzysztof Lobocki | C1CD76D4ABD90D3B | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | 1999-04-02 | Lawrence Ng | C1CD76D4ABD90D3B | 2098321 | Windows,Prime95,v17,(aka WT1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-10-14 | Oliver Kruse | 27E8945C4C0931A2 | 1 | 2236682 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-01 | storm5510 | 27E8945C4C0931A2 | 1 | 1390387 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-03-11 | LordJulius | NF | no factor TF: 1-60 | | 2019-07-04 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-12-01 | storm5510 | C-PRP | M2557169/34606737579714874466716319 : 27E8945C4C0931A2 | | 2017-10-14 | Oliver Kruse | C-PRP | M2557169/34606737579714874466716319 : 27E8945C4C0931A2 | | 2014-04-13 | Andy Incline | F-ECM | Factor: 34606737579714874466716319 | | 2013-10-23 | lycorn | NF | no factor TF: 62-63 | | 2011-12-26 | c10ck3r | NF | no factor TF: 61-62 | | 2011-04-11 | James Heinrich | NF-PM1 | B1=175000, B2=4068750, E=6 | | 2011-01-09 | Joss | NF-PM1 | B1=50000 | | 2011-01-03 | Joss | NF-PM1 | B1=30000 | | 2010-12-21 | Joss | NF-PM1 | B1=20000 | | 2009-02-01 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-11-08 | Team Prime Rib | NF-PM1 | B1=15000, B2=198750 | | 2003-10-23 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-04-02 | -anonymous- | C-LL | C1CD76D4ABD90D3B | | 1999-03-15 | -anonymous- | NF | no factor TF: 1-59 |
|
