| 2305153 | 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 | 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 | CF979520886BE233 | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-22 | storm5510 | CF979520886BE233 | 1 | 496199 | 1 | 3 | | Verified | Certified Good | 2023-10-25 | Anton Tsvetkov | 3A1C0C84767B26F6 | 2 | 511762 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2023-10-25 | James Heinrich | CERT | Proof certified good | | 2023-10-25 | Anton Tsvetkov | C-PRP | M2305153/11785890691051513/609957310998087008087 : 3A1C0C84767B26F6 Proof Certified Good
Proof Power: 7
| | 2023-10-25 | debrouxl | F-ECM | Factor: 609957310998087008087 / ECM curve 49, B1=50000, B2=7000000, Montgomery Sigma=5081319104860570 | | 2021-06-10 | ViliamF | NF-PM1 | B1=5000000, B2=505000000 | | 2018-02-18 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2017-11-22 | storm5510 | C-PRP | M2305153/11785890691051513 : CF979520886BE233 | | 2017-10-11 | Oliver Kruse | C-PRP | M2305153/11785890691051513 : CF979520886BE233 |
|
