| 2572523 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 93 / 280 |
Estimated T-Level: 21.7 ⓘ TF below 2^67 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Earl Malmrose | D4CF746EF8AE78D1 | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | 1999-06-15 | Frank Fullum | D4CF746EF8AE78D1 | 1181875 | Windows,Prime95,v17,NT service,(aka WT5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-10-15 | Oliver Kruse | CDEEC6DFBB86316D | 1 | 1482944 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-01 | storm5510 | CDEEC6DFBB86316D | 1 | 146094 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2023-01-25 | USAFSS | NF-PM1 | B1=232000, B2=246888180 | | 2022-03-11 | LordJulius | NF | no factor TF: 1-60 | | 2017-12-01 | storm5510 | C-PRP | M2572523/558811165777370552807 : CDEEC6DFBB86316D | | 2017-10-15 | Oliver Kruse | C-PRP | M2572523/558811165777370552807 : CDEEC6DFBB86316D | | 2010-05-14 | Lupo | F-ECM | Factor: 558811165777370552807 | | 2009-01-31 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-11-08 | Team Prime Rib | NF-PM1 | B1=15000, B2=202500 | | 2003-10-31 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-06-15 | -anonymous- | C-LL | D4CF746EF8AE78D1 | | 1999-03-26 | -anonymous- | NF | no factor TF: 1-59 |
|
