| 80817281 | Composite: proven not-prime with Lucas-Lehmer test No factors below 275 TF target 275 |
| P-1 | | B1 = | 6900000 | | B2 = | 1981900830 |
|
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Verified | 2017-08-14 | Choi4KANG | 4E8BEC2A3F9EFAAC | 47622722 | Windows,Prime95,v27.7,build 2 | | Verified | 2026-06-29 | wigglefruit | 4E8BEC2A3F9EFAAC | 0 | Linux64,prpll,v0.15-355-g7b6b2c1 |
|
| History | | Date | User | Type | Result |
|---|
| 2026-06-29 | wigglefruit | C-LL | 4E8BEC2A3F9EFAAC | | 2026-01-17 | Ensigma | NF-PM1 | B1=6900000, B2=1981900830 | | 2017-08-14 | Choi4KANG | C-LL | 4E8BEC2A3F9EFAAC | | 2017-03-09 | arnaud | NF-PM1 | B1=675000, B2=12825000 | | 2016-09-04 | -anonymous- | NF | no factor TF: 74-75 | | 2016-09-04 | -anonymous- | NF | no factor TF: 73-74 | | 2016-09-04 | -anonymous- | NF | no factor TF: 72-73 | | 2016-09-04 | -anonymous- | NF | no factor TF: 71-72 | | 2013-11-02 | Robish | NF | no factor TF: 70-71 | | 2013-02-01 | Bold_Seeker | NF | no factor TF: 69-70 | | 2013-01-28 | Bold_Seeker | NF | no factor TF: 68-69 | | 2013-01-26 | Bold_Seeker | NF | no factor TF: 67-68 | | 2013-01-25 | rjbelans | NF | no factor TF: 66-67 | | 2011-02-02 | vapaddy | NF | no factor TF: 65-66 | | 2010-12-11 | Architects Cubed | NF | no factor TF: 64-65 |
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