| 49688423 | Composite: proven not-prime with Lucas-Lehmer test No factors below 276 TF target 273 |
| P-1 | | B1 = | 1500000 | | B2 = | 45000000 |
|
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 11 / 280 |
Estimated T-Level: 20.2 ⓘ TF below 2^62 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Verified | 2012-12-19 | thilliar | 193EDC0F8C32AA4B | 47520758 | Windows 64-bit,Prime95,v27.7,build 2 | | Verified | 2019-12-18 | Dubslow | 193EDC0F8C32AA4B | 33442298 | Linux 64-bit,Prime95,v29.8,build 6 |
|
| History | | Date | User | Type | Result |
|---|
| 2021-05-18 | Anton Repko | NF | no factor TF: 74-76 | | 2021-05-12 | Anton Repko | NF-PP1 | Start=2/7, B1=700000, B2=34300000 | | 2021-03-14 | Sid & Andy | NF-PM1 | B1=1500000, B2=45000000 | | 2019-12-18 | Dubslow | C-LL | 193EDC0F8C32AA4B | | 2019-01-05 | -anonymous- | NF | no factor TF: 73-74 | | 2018-01-23 | Mark Rose | NF | no factor TF: 72-73 | | 2012-12-19 | thilliar | C-LL | 193EDC0F8C32AA4B | | 2011-12-03 | Craig Meyers | NF | no factor TF: 69-72 | | 2010-02-18 | Dex Star | NF-PM1 | B1=780000 | | 2008-09-23 | Team Prime Rib | NF | no factor TF: 1-69 | | 2007-08-14 | 1997rj7 | NF | no factor TF: 1-63 | | 2003-12-31 | Team Prime Rib | NF | no factor TF: 1-59 |
|
