| 2542681 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 209 / 280 |
Estimated T-Level: 23.7 ⓘ TF below 2^74 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) | 2017-10-14 | Oliver Kruse | ABE5AC355F406100 | 1 | 2292780 | 5 | 3 | | Factored | PRP without proof (not generated) | 2017-12-01 | storm5510 | ABE5AC355F406100 | 1 | 735802 | 5 | 3 | | Verified | Certified Good | 2025-09-18 | JC_Herles | ABE5AC355F406100 | 2 | 1197792 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-09-19 | Robert Martinazzi | CERT | Proof certified good | | 2025-09-18 | JC_Herles | C-PRP | M2542681/361060703/285442523354413288118039 : ABE5AC355F406100 Proof Certified Good
Proof Power: 7
| | 2025-09-18 | JC_Herles | F-ECM | Factor: 285442523354413288118039 / ECM curve 44, B1=77368, B2=117709515, Edwards Sigma=1527467119219557 | | 2022-08-24 | USAFSS | NF-PM1 | B1=300000, B2=259451010 | | 2017-12-01 | storm5510 | C-PRP | M2542681/361060703 : ABE5AC355F406100 | | 2017-10-14 | Oliver Kruse | C-PRP | M2542681/361060703 : ABE5AC355F406100 |
|
