| 2331859 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 125 / 640 |
Estimated T-Level: 26.0 ⓘ TF below 2^81 is very unlikely to find new factors due to ECM effort. |
| 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 | 919F57DD3A23E58F | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-23 | storm5510 | 919F57DD3A23E58F | 1 | 2121361 | 1 | 3 | | Verified | Certified Good | 2025-04-21 | feather | AA29FA578ED40A4B | 2 | 485450 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-04-21 | Fabrice Bellet | CERT | Proof certified good | | 2025-04-21 | feather | C-PRP | M2331859/734517587712239/1553459709922632479879 : AA29FA578ED40A4B Proof Certified Good
Proof Power: 7
| | 2025-04-21 | feather | F-ECM | Factor: 1553459709922632479879 / ECM curve 29, B1=81612, B2=43238910, Edwards Sigma=1792438203477877 | | 2021-04-20 | ViliamF | NF-PM1 | B1=5000000, B2=505000000 | | 2018-03-18 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2017-11-23 | storm5510 | C-PRP | M2331859/734517587712239 : 919F57DD3A23E58F | | 2017-10-11 | Oliver Kruse | C-PRP | M2331859/734517587712239 : 919F57DD3A23E58F |
|
