| 2301883 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 124 / 640 |
Estimated T-Level: 26.0 ⓘ TF below 2^81 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Allan Schrum | 37ED3DF6412AF30F | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | 1999-03-01 | Michael Croon | 37ED3DF6412AF30F | 2166550 | Linux 32-bit,Prime95,v17,(aka WT2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-10-11 | Oliver Kruse | A42817C5CDB2D4EB | 1 | 0 | 1 | 3 | | Verified | PRP without proof (not generated) | 2017-11-22 | storm5510 | A42817C5CDB2D4EB | 1 | 1334666 | 1 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-03-09 | LordJulius | NF | no factor TF: 1-60 | | 2021-04-07 | ViliamF | NF-PM1 | B1=5000000, B2=465000000 | | 2018-02-16 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2017-11-22 | storm5510 | C-PRP | M2301883/3952206601162432070527 : A42817C5CDB2D4EB | | 2017-10-11 | Oliver Kruse | C-PRP | M2301883/3952206601162432070527 : A42817C5CDB2D4EB | | 2010-02-12 | Bud | F-PM1 | Factor: 3952206601162432070527 | | 2009-01-15 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-08-25 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-03-01 | -anonymous- | C-LL | 37ED3DF6412AF30F | | 1999-02-21 | -anonymous- | NF | no factor TF: 1-58 |
|
