| 2001511 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| P-1 factors | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 129 / 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 | | Bruce Bailey | 0BD6D2C55A43967F | 0 | Windows,Prime95,v13,(aka WP1) | | Factored | 1999-05-02 | Leon Helmink | 0BD6D2C55A43967F | 1181451 | Windows,Prime95,v18,(aka WU1) | | Factored | 2012-06-18 | Gaurav Khanna | 0BD6D2C55A43967F | 0 | MacLucasFFTW v8.1 Ballester |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-10-05 | Oliver Kruse | 2D0FED88C61EF355 | 1 | 0 | 1 | 3 | | Verified | PRP without proof (not generated) | 2017-11-13 | kkmrkkblmbrbk | 2D0FED88C61EF355 | 1 | 1955612 | 1 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-03-09 | LordJulius | NF | no factor TF: 1-60 | | 2017-11-13 | kkmrkkblmbrbk | C-PRP | M2001511/19885661711344389415428507505282354958833 : 2D0FED88C61EF355 | | 2017-10-05 | Oliver Kruse | C-PRP | M2001511/19885661711344389415428507505282354958833 : 2D0FED88C61EF355 | | 2016-03-17 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2013-11-11 | BloodIce | F-PM1 | Factor: 19885661711344389415428507505282354958833 | | 2013-07-16 | BloodIce | NF | no factor TF: 67-68 | | 2013-07-16 | BloodIce | NF | no factor TF: 66-67 | | 2013-06-11 | BloodIce | NF-PM1 | B1=10000000, B2=200000000, E=12 | | 2013-02-28 | BloodIce | NF | no factor TF: 65-66 | | 2013-02-28 | BloodIce | NF | no factor TF: 64-65 | | 2013-02-28 | BloodIce | NF | no factor TF: 63-64 | | 2013-02-17 | BloodIce | NF-PM1 | B1=6000000, B2=60000000, E=12 | | 2013-02-03 | dbaugh | NF | no factor TF: 62-63 | | 2012-06-18 | Gaurav Khanna | C-LL | 0BD6D2C55A43967F | | 2011-12-23 | Sebastian Hornbostel | NF | no factor TF: 61-62 | | 2010-11-21 | Joss | NF-PM1 | B1=200151 | | 2009-01-02 | Sturle Sunde | NF | no factor TF: 60-61 | | 2007-02-05 | markr | NF-PM1 | B1=25000, B2=387500 | | 2007-02-05 | markr | NF-PM1 | B1=50000, B2=1000000, E=6 | | 2003-11-16 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 2002-04-28 | Joss | NF-PM1 | B1=2000, B2=2000 | | 2002-04-28 | Joss | NF-PM1 | B1=10000, B2=10000 | | 2002-04-28 | Joss | NF-PM1 | B1=4000, B2=4000 | | 1999-05-02 | -anonymous- | C-LL | 0BD6D2C55A43967F | | 1999-01-02 | -anonymous- | NF | no factor TF: 1-58 |
|
