| 2543621 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 153 / 280 |
Estimated T-Level: 22.7 ⓘ TF below 2^71 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Thomas Honold | 8F9A6B4B21814955 | 0 | Linux 32-bit,Prime95,v14,(aka WQ2) | | Factored | 1999-05-30 | Brian Mowrey | 8F9A6B4B21814955 | 1950661 | 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) | 2017-10-14 | Oliver Kruse | F988AD365C71A8A9 | 1 | 1366986 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-01 | storm5510 | F988AD365C71A8A9 | 1 | 415648 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2023-01-25 | USAFSS | NF-PM1 | B1=223000, B2=238697550 | | 2022-03-11 | LordJulius | NF | no factor TF: 1-60 | | 2017-12-01 | storm5510 | C-PRP | M2543621/120009712397004804383 : F988AD365C71A8A9 | | 2017-10-14 | Oliver Kruse | C-PRP | M2543621/120009712397004804383 : F988AD365C71A8A9 | | 2010-04-30 | SubPrime | F-ECM | Factor: 120009712397004804383 | | 2009-01-31 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-11-08 | Team Prime Rib | NF-PM1 | B1=15000, B2=198750 | | 2003-10-23 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-05-30 | -anonymous- | C-LL | 8F9A6B4B21814955 | | 1999-03-15 | Brap_On | NF | no factor TF: 1-59 |
|
