| 2258527 | Composite, with 3 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| P-1 factors | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 163 / 640 |
Estimated T-Level: 26.3 ⓘ TF below 2^82 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) | 2017-10-10 | Oliver Kruse | F5F3AD095E38285F | 2 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-21 | storm5510 | F5F3AD095E38285F | 2 | 2189085 | 1 | 3 | | Verified | Certified Good | 2022-10-09 | LordJulius | 3238ABFE7305AB79 | 3 | 1891199 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-10-09 | Ben Delo | CERT | Proof certified good | | 2022-10-09 | LordJulius | C-PRP | M2258527/5528874097/25789442730207007151/686136700120818528107393107753 : 3238ABFE7305AB79 Proof Certified Good
Proof Power: 7
| | 2022-10-07 | debrouxl | F-ECM | Factor: 686136700120818528107393107753 / ECM curve 2, B1=50000, B2=6650000, Montgomery Sigma=4456608831962289 | | 2017-11-21 | storm5510 | C-PRP | M2258527/5528874097/25789442730207007151 : F5F3AD095E38285F | | 2017-10-10 | Oliver Kruse | C-PRP | M2258527/5528874097/25789442730207007151 : F5F3AD095E38285F | | 2016-04-14 | alpertron | F-PM1 | Factor: 25789442730207007151 / B1=500000, B2=15000000 |
|
