| 42786983 | Composite: proven not-prime with Lucas-Lehmer test No factors below 273 TF target 272 |
| P-1 | | B1 = | 1062233 | | B2 = | 23369126 |
|
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Verified | 2012-05-12 | Dubslow | C4521ED1FE8C335E | 17611768 | Linux 64-bit,Prime95,v27.7,build 1 | | Verified | 2016-09-21 | chandler johnson | C4521ED1FE8C335E | 36499653 | Windows 64-bit,Prime95,v28.7,build 1 |
|
| History | | Date | User | Type | Result |
|---|
| 2018-12-25 | -anonymous- | NF | no factor TF: 72-73 | | 2016-09-21 | chandler johnson | C-LL | C4521ED1FE8C335E | | 2012-05-12 | Dubslow | C-LL | C4521ED1FE8C335E | | 2012-04-29 | Jerry Hallett | NF | no factor TF: 68-72 | | 2012-04-19 | James Heinrich | NF-PM1 | B1=1062233, B2=23369126, E=12 | | 2008-06-22 | -anonymous- | NF-PM1 | B1=715000 | | 2007-07-24 | tsc | NF | no factor TF: 1-68 |
|
