| 81648221 | Composite: proven not-prime with Lucas-Lehmer test No factors below 276 TF target 275 |
| P-1 | | B1 = | 5400000 | | B2 = | 5400812340 |
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| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Verified | 2017-10-10 | SysConsult | 4DB67B0A2C652138 | 60975562 | Windows Service,Prime95,v27.7,build 2 | | Verified | 2026-08-31 | Kriesel | 4DB67B0A2C652138 | 51598257 | Windows 64-bit,Prime95,v30.19,build 4 |
|
| History | | Date | User | Type | Result |
|---|
| 2026-08-31 | Kriesel | C-LL | 4DB67B0A2C652138 | | 2026-08-26 | Ensigma | NF-PM1 | B1=5400000, B2=5400812340 | | 2026-08-25 | Ensigma | NF-PM1 | B1=5400000, B2=2700766530 | | 2026-08-25 | Ensigma | NF-PM1 | B1=5400000, B2=1800109080 | | 2026-02-13 | Kyle Askine | NF | no factor TF: 75-76 | | 2024-05-05 | James Heinrich | NF | no factor TF: 69-70 | | 2017-10-10 | SysConsult | C-LL | 4DB67B0A2C652138 | | 2016-11-06 | TheJudger | NF-PM1 | B1=695000, B2=14247500, E=12 | | 2016-10-27 | -anonymous- | NF | no factor TF: 74-75 | | 2016-10-27 | -anonymous- | NF | no factor TF: 73-74 | | 2016-10-27 | -anonymous- | NF | no factor TF: 72-73 | | 2016-10-27 | -anonymous- | NF | no factor TF: 71-72 | | 2014-08-16 | tmorrow | NF | no factor TF: 70-71 | | 2014-04-09 | linded | NF | no factor TF: 69-70 | | 2014-04-07 | A_Savchenko | NF | no factor TF: 68-69 | | 2014-04-03 | g0b | NF | no factor TF: 67-68 | | 2013-01-30 | phoenicis | NF | no factor TF: 66-67 | | 2011-02-28 | Ujjwal Chalise | NF | no factor TF: 65-66 | | 2010-12-10 | Architects Cubed | NF | no factor TF: 64-65 |
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