| 4007 | Composite: proven not-prime with Lucas-Lehmer test No factors below 266 TF target 244 |
| Assignments | | Assigned | User | Work Type | Stage | % Done | Updated | Est Complete | Expired |
|---|
| 2026-01-07 | mikr | ECM | C2S1 | 41.29 % | 2026-01-09 | 2026-01-15 | | | 2025-10-13 | Kamil Gorski | PM1-S | S1 | 78.59 % | 2026-01-10 | 2026-02-22 | |
|
| P-1 | | B1 = | 1013897566893 | | B2 = | 1457999819618992650 |
|
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 640 / 640 | | 35 | 1000000 | 1566 / 1566 | | 40 | 3000000 | 4588 / 4588 | | 45 | 11000000 | 9201 / 9201 | | 50 | 44000000 | 16550 / 16550 | | 55 | 110000000 | 40830 / 40830 | | 60 | 260000000 | 105362 / 105362 | | 65 | 800000000 | 194238 / 194238 | | 70 | 2400000000 | 73330 / 350860 |
Estimated T-Level: 66.0 ⓘ TF below 2^214 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Verified | | Unknown | 1FF8 | 0 | Unknown,(aka U) | | Verified | | George Woltman | EDBE70D1AE701FF8 | 0 | Woltman,Prime95,first web release,(aka W4) | | Verified | | Brian J. Beesley | EDBE70D1AE701FF8 | 0 | Mac,John Sweeney,v1.4,(aka J3) | | Verified | 2015-04-11 | MadPoo 🙂 | EDBE70D1AE701FF8 | 554 | Windows 64-bit,Prime95,v26,(aka We4) |
|
| History | | Date | User | Type | Result |
|---|
| 2025-07-21 | One Man | NF-PM1 | B1=1013897566893, B2=1457999819618992650 | | 2025-06-20 | -anonymous- | NF-PM1 | B1=4000000000000, B2=1.2016700776796E+19 | | 2025-02-13 | NStorm | NF-PM1 | B1=222000000000, B2=797946672322800 | | 2023-08-13 | masser | NF-PP1 | Start=6/5, B1=2300000000, B2=411700000000 | | 2023-07-10 | masser | NF-PP1 | Start=128/13, B1=2300000000, B2=92000000000 | | 2023-05-16 | -anonymous- | NF-PM1 | B1=81000000000, B2=812832933743280450 | | 2022-06-12 | Anton Repko | NF | no factor TF: 65-66 | | 2021-05-13 | ATH | NF-PP1 | Start=2/7, B1=1000000000, B2=241000000000 | | 2021-02-15 | Anton Repko | NF | no factor TF: 64-65 | | 2018-06-19 | snme2pm1 | NF | no factor TF: 63-64 | | 2016-11-08 | snme2pm1 | NF | no factor TF: 62-63 | | 2016-02-23 | LaurV | NF | no factor TF: 57-58 | | 2015-06-04 | Sid & Andy | NF | no factor TF: 61-62 | | 2015-04-11 | MadPoo 🙂 | C-LL | EDBE70D1AE701FF8 | | 2012-09-29 | bcp19 | NF | no factor TF: 60-61 | | 2012-08-16 | BloodIce | NF-PM1 | B1=200000000000, B2=2000000000000, E=12 | | 2012-07-16 | BloodIce | NF-PM1 | B1=100000000000 | | 2011-04-25 | Joss | NF-PM1 | B1=10000000000 | | 2011-02-21 | kurly | NF-PM1 | B1=5000000000, B2=300000000000, E=12 | | 2011-02-16 | monst | NF | no factor TF: 58-60 | | 2003-01-25 | -anonymous- | NF | no factor TF: 1-57 | | 2003-01-01 | -anonymous- | NF-PM1 | B1=4290000000 | | 2002-09-22 | -anonymous- | NF-PM1 | B1=3221225472, B2=4290000000, E=48 | | 2002-08-03 | -anonymous- | NF-PM1 | B1=2147483648, B2=4290000000, E=48 | | 2002-06-02 | -anonymous- | NF-PM1 | B1=1073741824, B2=4290000000, E=48 | | 2001-06-23 | -anonymous- | NF-PM1 | B1=3000000000, B2=4290000000 | | 2001-06-09 | -anonymous- | NF-PM1 | B1=43000000, B2=4290000000 | | 2001-02-11 | -anonymous- | NF-PM1 | B1=1000000, B2=100000000 | | 2000-08-24 | -anonymous- | NF | no factor TF: 1-56 | | 2000-02-09 | -anonymous- | NF | no factor TF: 54-55 | | 1999-12-23 | -anonymous- | NF | no factor TF: 53-54 | | 1999-09-22 | -anonymous- | NF | no factor TF: 52-53 |
|
