| 1072103 | 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 | 104 / 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 | | Robert L. Klungle | 5B478851C0154920 | 0 | Linux 32-bit,Prime95,v13,(aka WP2) | | Factored | | David Slowinski | 920 | 0 | Cray,Slowinski,(aka D4) | | Factored | 2002-03-03 | S57483 | 5B478851C0154920 | 889398 | Linux 32-bit,Prime95,v21,(aka WX2) | | Factored | 2016-06-01 | MadPoo 🙂 | 5B478851C0154920 | 188909 | Windows 64-bit,Prime95,v26,(aka We4) |
|
| PRP | | Status | Proof | Date | User | Residue | Shift | Type | Base |
|---|
| Factored | Certified Good Power=6 | 2025-09-01 | Kriesel | D556C4A570536550 | 0 | 1 | 3 |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-12-01 | storm5510 | D556C4A570536550 | 1 | 979878 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-02 | kkmrkkblmbrbk | D556C4A570536550 | 1 | 665965 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-09-01 | S00030 | CERT | Proof certified good | | 2025-09-01 | Kriesel | C-PRP | D556C4A570536550 Proof Certified Good
Proof Power: 6
| | 2017-12-02 | kkmrkkblmbrbk | C-PRP | M1072103/74758179011396392632199 : D556C4A570536550 | | 2017-12-01 | storm5510 | C-PRP | M1072103/74758179011396392632199 : D556C4A570536550 | | 2017-12-01 | TJAOI | F-ECM | Factor: 74758179011396392632199 | | 2016-06-01 | MadPoo 🙂 | C-LL | 5B478851C0154920 | | 2016-05-23 | Bruno Victal | NF-PM1 | B1=2500000, B2=62500000, E=12 | | 2016-03-29 | Joss | NF-PM1 | B1=978782 | | 2016-03-23 | Joss | NF-PM1 | B1=815652 | | 2016-02-23 | Mark Rose | NF | no factor TF: 58-60 | | 2015-10-16 | Bruno Victal | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2014-10-28 | Joss | NF-PM1 | B1=319734 | | 2014-08-15 | -anonymous- | NF-PM1 | B1=259867 | | 2014-04-01 | Never Odd Or Even | NF | no factor TF: 70-71 | | 2013-09-29 | Never Odd Or Even | NF | no factor TF: 69-70 | | 2013-09-29 | Never Odd Or Even | NF | no factor TF: 68-69 | | 2013-04-27 | Never Odd Or Even | NF | no factor TF: 67-68 | | 2013-04-27 | Never Odd Or Even | NF | no factor TF: 66-67 | | 2013-04-27 | Never Odd Or Even | NF | no factor TF: 65-66 | | 2013-04-27 | Never Odd Or Even | NF | no factor TF: 64-65 | | 2013-04-27 | Never Odd Or Even | NF | no factor TF: 63-64 | | 2012-10-11 | dbaugh | NF | no factor TF: 62-63 | | 2012-01-02 | bcp19 | NF-PM1 | B1=200000, B2=10000000, E=12 | | 2010-11-14 | Michael C | NF | no factor TF: 61-62 | | 2009-02-15 | Sturle Sunde | NF | no factor TF: 60-61 | | 2004-04-09 | -anonymous- | NF-PM1 | B1=100000, B2=2000000, E=6 | | 2003-04-03 | -anonymous- | NF | no factor TF: 1-58 | | 2002-03-03 | -anonymous- | C-LL | 5B478851C0154920 | | 2002-02-17 | Joss | NF-PM1 | B1=10000, B2=145000 | | 2001-11-24 | -anonymous- | NF | no factor TF: 1-57 |
|
