| 1398017 | Composite: proven not-prime with both PRP and Lucas-Lehmer tests No factors below 268 TF target 260 |
| P-1 | | B1 = | 22500000 | | B2 = | 115536843240 |
|
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 105 / 640 |
Estimated T-Level: 25.8 ⓘ TF below 2^81 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Verified | | Joel Armengaud | 4968806BB0F4DB28 | 0 | Windows,Prime95,v13,(aka WP1) | | Bad | | Dwayne Towell | 49A8806CB134DB28 | 0 | Mac,John Sweeney,v1.4,(aka J3) | | Verified | 2003-09-21 | Gord Palameta | 4968806BB0F4DB28 | 491817 | Linux 32-bit,Prime95,v23,(aka WZ2) | | Verified | 2015-03-28 | MadPoo 🙂 | 4968806BB0F4DB28 | 684791 | Windows 64-bit,Prime95,v26,(aka We4) |
|
| PRP | | Status | Proof | Date | User | Residue | Shift | Type | Base |
|---|
| Verified | Certified Good Power=6 | 2020-11-07 | Ethan O'Connor | A7D64DF816F4F9A1 | 292018 | 1 | 3 | | Verified | Certified Good Power=6 | 2025-09-01 | Kriesel | A7D64DF816F4F9A1 | 0 | 1 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-09-03 | ANONYMOUS | CERT | Proof certified good | | 2025-09-01 | Kriesel | C-PRP | A7D64DF816F4F9A1 Proof Certified Good
Proof Power: 6
| | 2023-10-06 | Sid & Andy | NF-PM1 | B1=22500000, B2=115536843240 | | 2023-06-18 | Joss | NF-PM1 | B1=1398017, B2=18738449730 | | 2023-01-30 | Joss | NF-PM1 | B1=1398017, B2=3483900420 | | 2023-01-11 | Joss | NF-PM1 | B1=1398017, B2=1268467200 | | 2020-11-08 | volki | CERT | Proof certified good | | 2020-11-07 | Ethan O'Connor | C-PRP | A7D64DF816F4F9A1 Proof Certified Good
Proof Power: 6
| | 2020-02-28 | Gordon Spence | NF | no factor TF: 67-68 | | 2019-05-24 | BigBrother | NF-PM1 | B1=10000000, B2=200000000 | | 2018-10-14 | Joss | NF-PM1 | B1=1398017, B2=153781870, E=12 | | 2018-10-07 | Joss | NF-PM1 | B1=1398017, B2=27960340, E=12 | | 2018-10-05 | Joss | NF-PM1 | B1=1398017, B2=13980170, E=12 | | 2018-04-02 | TJAOI | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 58-60 | | 2015-09-25 | ramgeis | NF | no factor TF: 65-66 | | 2015-04-19 | snme2pm1 | NF | no factor TF: 64-65 | | 2015-04-19 | snme2pm1 | NF | no factor TF: 63-64 | | 2015-03-28 | MadPoo 🙂 | C-LL | 4968806BB0F4DB28 | | 2014-10-04 | mikr | NF-PM1 | B1=3106900, B2=111849000, E=12 | | 2014-04-23 | -anonymous- | NF-PM1 | B1=200000 | | 2014-04-17 | Joss | NF-PM1 | B1=120000 | | 2014-04-16 | Joss | NF-PM1 | B1=110000 | | 2013-01-27 | dbaugh | NF | no factor TF: 62-63 | | 2012-07-04 | Grant McCracken | NF | no factor TF: 61-62 | | 2009-02-15 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-09-21 | kkmrkkblmbrbk | C-LL | 4968806BB0F4DB28 | | 2003-09-21 | megavink | NF-PM1 | B1=15000, B2=228750 | | 2003-09-21 | kkmrkkblmbrbk | NF-PM1 | B1=15000, B2=228750 | | 2003-09-21 | Team Prime Rib | NF-PM1 | B1=15000, B2=228750 | | 2003-07-13 | -anonymous- | NF | no factor TF: 1-58 | | 2001-10-27 | -anonymous- | NF | no factor TF: 1-57 |
|
