| 2268887 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 269 TF target 262 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 157 / 640 |
Estimated T-Level: 26.2 ⓘ TF below 2^82 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | David Baugh | 9CEFF0B8C1538345 | 0 | Windows,Prime95,v13,(aka WP1) | | Factored | 1999-02-14 | Sami | 9CEFF0B8C1538345 | 1732770 | Windows,Prime95,v17,(aka WT1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-10-10 | Oliver Kruse | DDFBBFA67D52482F | 1 | 0 | 1 | 3 | | Verified | PRP without proof (not generated) | 2017-11-21 | storm5510 | DDFBBFA67D52482F | 1 | 2118774 | 1 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2017-11-21 | storm5510 | C-PRP | M2268887/741945497953767372487 : DDFBBFA67D52482F | | 2017-10-10 | Oliver Kruse | C-PRP | M2268887/741945497953767372487 : DDFBBFA67D52482F | | 2016-04-25 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2012-08-19 | dbaugh | F-PM1 | Factor: 741945497953767372487 | | 2012-08-02 | dbaugh | NF | no factor TF: 68-69 | | 2012-07-24 | dbaugh | NF | no factor TF: 67-68 | | 2012-07-19 | dbaugh | NF | no factor TF: 66-67 | | 2012-07-11 | dbaugh | NF | no factor TF: 65-66 | | 2012-07-07 | dbaugh | NF | no factor TF: 64-65 | | 2012-07-07 | dbaugh | NF | no factor TF: 63-64 | | 2012-06-26 | dbaugh | NF | no factor TF: 62-63 | | 2012-05-06 | Sebastian Hornbostel | NF | no factor TF: 61-62 | | 2011-01-03 | markr | NF-PM1 | B1=100000, B2=2100000, E=6 | | 2010-11-12 | Joss | NF-PM1 | B1=30000 | | 2010-11-06 | Joss | NF-PM1 | B1=15000 | | 2009-01-14 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-04-27 | -anonymous- | NF-PM1 | B1=2048, B2=204800, E=12 | | 1999-02-14 | -anonymous- | C-LL | 9CEFF0B8C1538345 |
|
