| 1048507 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 271 TF target 260 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 99 / 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 |
|---|
| Factored | | Tom Cage | B746F5680BFC3B27 | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | | John Lloyd | B746F5680BFC3B27 | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | | Phil Nesser | B746F5680BFC3B27 | 0 | Windows,Prime95,v11,(aka WC) | | Factored | | Cornelius Caesar | B746F5680BFC3B27 | 0 | Crandall,(aka X) | | Bad | | Ernst W. Mayer | B746F5680BFB3B27 | 0 | Mlucas,Ernst Mayer,v2.4c and earlier,(aka E) | | Bad | | Tom Cage | 464A0BBDAFA2DCE0 | 0 | Mac,John Sweeney,v1.4,(aka J3) | | Bad | | Cornelius Caesar | 464A0BBDAFA2DCE0 | 0 | Mac,John Sweeney,v1.4,(aka J3) | | Factored | 2015-03-28 | MadPoo 🙂 | B746F5680BFC3B27 | 696105 | Windows 64-bit,Prime95,v26,(aka We4) | | Factored | 2016-05-13 | kkmrkkblmbrbk | B746F5680BFC3B27 | 851408 | Windows 64-bit,Prime95,v28.9,build 2 |
|
| PRP | | Status | Proof | Date | User | Residue | Shift | Type | Base |
|---|
| Factored | Certified Good Power=6 | 2025-09-01 | Kriesel | 44DE45E0E4E14A3E | 0 | 1 | 3 |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-11-04 | Oliver Kruse | 44DE45E0E4E14A3E | 1 | 221033 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-11-04 | ATH | 44DE45E0E4E14A3E | 1 | 458097 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-09-02 | 0x | CERT | Proof certified good | | 2025-09-01 | Kriesel | C-PRP | 44DE45E0E4E14A3E Proof Certified Good
Proof Power: 6
| | 2021-07-18 | ViliamF | NF-PM1 | B1=10000000, B2=930000000 | | 2017-11-04 | ATH | C-PRP | M1048507/350193148542166876732981697 : 44DE45E0E4E14A3E | | 2017-11-04 | Oliver Kruse | C-PRP | M1048507/350193148542166876732981697 : 44DE45E0E4E14A3E | | 2017-11-03 | TJAOI | F-ECM | Factor: 350193148542166876732981697 | | 2016-05-19 | Bruno Victal | NF-PM1 | B1=2500000, B2=62500000, E=12 | | 2016-05-13 | kkmrkkblmbrbk | C-LL | B746F5680BFC3B27 | | 2016-03-27 | Joss | NF-PM1 | B1=1085731 | | 2016-02-23 | Mark Rose | NF | no factor TF: 59-60 | | 2015-10-16 | Bruno Victal | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2015-03-28 | MadPoo 🙂 | C-LL | B746F5680BFC3B27 | | 2014-10-18 | Joss | NF-PM1 | B1=322428 | | 2014-08-21 | Joss | NF-PM1 | B1=261214 | | 2014-04-01 | Never Odd Or Even | NF | no factor TF: 70-71 | | 2013-10-24 | Never Odd Or Even | NF | no factor TF: 69-70 | | 2013-10-24 | Never Odd Or Even | NF | no factor TF: 68-69 | | 2013-04-07 | Never Odd Or Even | NF | no factor TF: 67-68 | | 2013-04-07 | Never Odd Or Even | NF | no factor TF: 66-67 | | 2013-04-07 | Never Odd Or Even | NF | no factor TF: 65-66 | | 2013-04-07 | Never Odd Or Even | NF | no factor TF: 64-65 | | 2013-01-07 | dbaugh | NF | no factor TF: 63-64 | | 2012-01-05 | bcp19 | NF-PM1 | B1=200000, B2=10000000, E=12 | | 2010-12-09 | Michael C | NF | no factor TF: 62-63 | | 2010-11-10 | Michael C | NF | no factor TF: 61-62 | | 2009-02-15 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-03-16 | -anonymous- | NF | no factor TF: 1-59 | | 2003-02-16 | -anonymous- | NF-PM1 | B1=4096, B2=409600, E=12 | | 2003-02-16 | -anonymous- | NF | no factor TF: 1-58 | | 2003-02-09 | -anonymous- | NF-PM1 | B1=2048, B2=204800, E=12 | | 2001-11-14 | -anonymous- | NF | no factor TF: 1-57 | | 2001-08-24 | -anonymous- | NF-PM1 | B1=15000, B2=195000 |
|
