| 2276741 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 122 / 640 |
Estimated T-Level: 26.0 ⓘ TF below 2^81 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Owen Lawrence | 16BF10B0ECCE2084 | 0 | Windows,Prime95,v13,(aka WP1) | | Factored | 1999-02-21 | Kenneth L. Witt | 16BF10B0ECCE2084 | 701715 | 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) | 2017-10-11 | Oliver Kruse | D4925F8DF2431736 | 1 | 0 | 1 | 3 | | Verified | PRP without proof (not generated) | 2017-11-21 | storm5510 | D4925F8DF2431736 | 1 | 1139345 | 1 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2023-05-13 | This -Anonymous- | NF-PM1 | B1=800000, B2=40000000, E=12 | | 2017-11-21 | storm5510 | C-PRP | M2276741/647681166150860489689 : D4925F8DF2431736 | | 2017-10-11 | Oliver Kruse | C-PRP | M2276741/647681166150860489689 : D4925F8DF2431736 | | 2016-12-16 | bam | F-ECM | Factor: 647681166150860489689 | | 2016-04-15 | Joss | NF-PM1 | B1=391910, B2=14199530, E=12 | | 2016-04-06 | Joss | NF-PM1 | B1=391910, B2=7054380, E=12 | | 2016-04-02 | Joss | NF-PM1 | B1=326592 | | 2016-03-20 | Joss | NF-PM1 | B1=272160 | | 2016-02-23 | Mark Rose | NF | no factor TF: 1-60 | | 2015-11-01 | ramgeis | NF | no factor TF: 65-66 | | 2015-03-10 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-03-10 | VictordeHollander | NF | no factor TF: 63-64 | | 2014-09-15 | -anonymous- | NF-PM1 | B1=133191 | | 2013-12-06 | Jerry Hallett | NF | no factor TF: 62-63 | | 2012-05-06 | Sebastian Hornbostel | NF | no factor TF: 61-62 | | 2011-01-01 | markr | NF-PM1 | B1=105000, B2=2152500, E=6 | | 2010-11-14 | Joss | NF-PM1 | B1=30000 | | 2010-11-06 | Joss | NF-PM1 | B1=15000 | | 2009-01-14 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-04-27 | -anonymous- | NF-PM1 | B1=2048, B2=204800, E=12 | | 1999-02-21 | Kenneth Witt | C-LL | 16BF10B0ECCE2084 |
|
