| 1924751 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 261 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 107 / 640 |
Estimated T-Level: 25.8 ⓘ TF below 2^81 is very unlikely to find new factors due to ECM effort. |
| PRP | | Status | Proof | Date | User | Residue | Shift | Type | Base |
|---|
| Factored | Certified Good Power=6 | 2025-09-02 | Kriesel | 6C0E8125CAFB10A8 | 0 | 1 | 3 |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2017-10-04 | Oliver Kruse | 33235ACE3F475457 | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-10 | ATH | 33235ACE3F475457 | 1 | 967062 | 1 | 3 | | Verified | PRP without proof (not generated) | 2021-05-08 | ThomRuley | 6C0E8125CAFB10A8 | 2 | 1739119 | 5 | 3 | | Verified | Certified Good | 2021-05-09 | marssystems | 6C0E8125CAFB10A8 | 2 | 223123 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-09-03 | Carlos Pinho | CERT | Proof certified good | | 2025-09-02 | Kriesel | C-PRP | 6C0E8125CAFB10A8 Proof Certified Good
Proof Power: 6
| | 2021-07-27 | happy5214 | NF-PP1 | Start=2/7, B1=2500000, B2=190000000 | | 2021-05-09 | garo | CERT | Proof certified good | | 2021-05-09 | marssystems | C-PRP | M1924751/265615639/4106464775643002298257 : 6C0E8125CAFB10A8 Proof Certified Good
Proof Power: 7
| | 2021-05-08 | ThomRuley | C-PRP | M1924751/265615639/4106464775643002298257 : 6C0E8125CAFB10A8 | | 2021-05-07 | happy5214 | F-PP1 | Factor: 4106464775643002298257 / Start=2/7, B1=2500000 | | 2021-05-07 | happy5214 | NF-PM1 | B1=5000000, B2=530000000 | | 2017-11-10 | ATH | C-PRP | M1924751/265615639 : 33235ACE3F475457 | | 2017-10-04 | Oliver Kruse | C-PRP | M1924751/265615639 : 33235ACE3F475457 | | 2016-03-17 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 |
|
