| 16777213 | Composite: proven not-prime with both PRP and Lucas-Lehmer tests No factors below 275 TF target 269 |
| P-1 | | B1 = | 2000000 | | B2 = | 773251050 |
|
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 58 / 640 |
Estimated T-Level: 25.5 ⓘ TF below 2^80 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Verified | | S09429 | AF44FAB38FEC83A4 | 16720752 | Linux 32-bit,Prime95,v20,(aka WW2) | | Verified | 2000-03-15 | Brian J. Beesley | AF44FAB38FEC83A4 | 2357813 | Windows,Prime95,v19,(aka WV1) | | Verified | 2002-01-08 | Gregory Allen | AF44FAB38FEC83A4 | 6388295 | Windows,Prime95,v21,(aka WX1) | | Verified | 2017-06-08 | DaniloChavez | AF44FAB38FEC83A4 | 6806015 | Windows 64-bit,Prime95,v28.10,build 1 |
|
| PRP | | Status | Proof | Date | User | Residue | Shift | Type | Base |
|---|
| Verified | Certified Good Power=8 | 2025-02-14 | kkmrkkblmbrbk | D9249AC74CB4D24F | 971604 | 1 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-14 | S00030 | CERT | Proof certified good | | 2025-02-14 | kkmrkkblmbrbk | C-PRP | D9249AC74CB4D24F Proof Certified Good
Proof Power: 8
| | 2022-03-07 | Architects Cubed | NF-PM1 | B1=2000000, B2=773251050 | | 2019-07-22 | James Heinrich 🙂 | NF-PM1 | B1=330000, B2=6600000, E=12 | | 2018-11-12 | kkmrkkblmbrbk | NF | no factor TF: 73-74 | | 2018-11-12 | kkmrkkblmbrbk | NF | no factor TF: 74-75 | | 2017-06-08 | DaniloChavez | C-LL | AF44FAB38FEC83A4 | | 2016-04-14 | BloodIce | NF | no factor TF: 72-73 | | 2016-04-14 | BloodIce | NF | no factor TF: 71-72 | | 2016-04-14 | BloodIce | NF | no factor TF: 70-71 | | 2016-04-14 | BloodIce | NF | no factor TF: 69-70 | | 2016-04-14 | BloodIce | NF | no factor TF: 68-69 | | 2016-04-14 | BloodIce | NF | no factor TF: 67-68 | | 2016-04-14 | BloodIce | NF | no factor TF: 66-67 | | 2016-04-14 | BloodIce | NF | no factor TF: 65-66 | | 2016-04-14 | BloodIce | NF | no factor TF: 1-65 | | 2015-10-31 | Sid & Andy | NF-PM1 | B1=180000, B2=3375000, E=6 | | 2014-09-16 | Nesowa | NF | no factor TF: 66-67 | | 2014-03-16 | Nesowa | NF | no factor TF: 65-66 | | 2002-08-10 | -anonymous- | C-LL | AF44FAB38FEC83A4 | | 2002-01-08 | -anonymous- | C-LL | AF44FAB38FEC83A4 | | 2001-11-10 | -anonymous- | NF-PM1 | B1=145000, B2=1160000 | | 2000-03-15 | -anonymous- | C-LL | AF44FAB38FEC83A4 | | 1999-12-08 | willmore | NF | no factor TF: 1-65 | | 1999-10-21 | willmore | NF | no factor TF: 1-65 |
|
