| 2303999 | Composite, with 3 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| P-1 factors | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 118 / 640 |
Estimated T-Level: 25.9 ⓘ TF below 2^81 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Charles Gallo | 2A8B5D5B41A4F55A | 0 | Windows,Prime95,v13,(aka WP1) | | Factored | 1999-08-22 | Aleksei Abramov | 2A8B5D5B41A4F55A | 945226 | Windows,Prime95,v18,NT service,(aka WU5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2017-10-11 | Oliver Kruse | 39598C71A2BD6E66 | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-22 | kkmrkkblmbrbk | 39598C71A2BD6E66 | 1 | 342112 | 1 | 3 | | Factored | Certified Good | 2021-04-11 | Zero | 939955A425121A2E | 2 | 188153 | 5 | 3 | | Verified | Certified Good | 2025-03-01 | Jason Lynch | 939955A425121A2E | 3 | 372890 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-01 | flaq | CERT | Proof certified good | | 2025-03-01 | Jason Lynch | C-PRP | M2303999/2028799242437653653953/65302930207735704308519/405175660634996901470762873 : 939955A425121A2E Proof Certified Good
Proof Power: 7
| | 2025-02-20 | Dmitry Bolshakov | F-ECM | Factor: 405175660634996901470762873 / ECM curve 11, B1=80482, B2=7967883, Edwards Sigma=8658246471910504 | | 2021-04-11 | Simon Josefsson | CERT | Proof certified good | | 2021-04-11 | Zero | C-PRP | M2303999/2028799242437653653953/65302930207735704308519 : 939955A425121A2E Proof Certified Good
Proof Power: 7
| | 2021-04-07 | ViliamF | F-PM1 | Factor: 65302930207735704308519 / B1=5000000, B2=505000000 | | 2018-02-18 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2017-11-22 | kkmrkkblmbrbk | C-PRP | M2303999/2028799242437653653953 : 39598C71A2BD6E66 | | 2017-10-11 | Oliver Kruse | C-PRP | M2303999/2028799242437653653953 : 39598C71A2BD6E66 | | 2016-04-18 | AnthonyRais | F-ECM | Factor: 2028799242437653653953 | | 2016-02-23 | Mark Rose | NF | no factor TF: 1-60 | | 2015-10-21 | ramgeis | NF | no factor TF: 65-66 | | 2015-02-27 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-02-27 | VictordeHollander | NF | no factor TF: 63-64 | | 2013-12-06 | Jerry Hallett | NF | no factor TF: 62-63 | | 2011-07-20 | Rob_Dee | NF | no factor TF: 61-62 | | 2010-02-15 | Bud | NF-PM1 | B1=500000, B2=10000000, E=12 | | 2009-01-16 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-09-14 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-08-22 | -anonymous- | C-LL | 2A8B5D5B41A4F55A |
|
