| 2277811 | 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 | 124 / 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 | CD63494D638D4C26 | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-22 | Chang Chia-Tche | CD63494D638D4C26 | 1 | 579075 | 1 | 3 | | Verified | Certified Good | 2025-03-30 | Anton Tsvetkov | 52667A1F80474230 | 2 | 2045430 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-30 | houbenmr | CERT | Proof certified good | | 2025-03-30 | Anton Tsvetkov | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-03-30 | Anton Tsvetkov | F-ECM | Factor: 105106295962169367429007 / ECM curve 40, B1=86190, B2=33629310, Edwards Sigma=5456868697797349 | | 2017-11-22 | Chang Chia-Tche | C-PRP | M2277811/234468753097 : CD63494D638D4C26 | | 2017-10-11 | Oliver Kruse | C-PRP | M2277811/234468753097 : CD63494D638D4C26 | | 2016-04-07 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 |
|
