| 2331997 | Composite, with 3 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 123 / 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 | 0FF6C6B5B5FC7543 | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-23 | storm5510 | 0FF6C6B5B5FC7543 | 1 | 1880693 | 1 | 3 | | Verified | Certified Good | 2026-01-21 | Oliver Kruse | C7BBF91C88BF78EC | 3 | 587065 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2026-01-21 | Massimo Cappelli (ik5pwa) | CERT | Proof certified good | | 2026-01-21 | Oliver Kruse | C-PRP | M2331997/4197594601/89551288027691778998519/53264734849629479867616697229473 : C7BBF91C88BF78EC Proof Certified Good
Proof Power: 7
| | 2026-01-16 | TJAOI | F-ECM | Factor: 53264734849629479867616697229473 / ECM curve 3, B1=250000, B2=254050335, Edwards Sigma=339110957674830 | | 2026-01-16 | TJAOI | F-ECM | Factor: 89551288027691778998519 / ECM curve 19, B1=250000, B2=254050335, Edwards Sigma=331365560946528 | | 2021-04-20 | ViliamF | NF-PM1 | B1=5000000, B2=455000000 | | 2018-03-18 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2017-11-23 | storm5510 | C-PRP | M2331997/4197594601 : 0FF6C6B5B5FC7543 | | 2017-10-11 | Oliver Kruse | C-PRP | M2331997/4197594601 : 0FF6C6B5B5FC7543 |
|
