| 2258863 | Composite, with 3 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 186 / 640 |
Estimated T-Level: 26.5 ⓘ TF below 2^83 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 | 8C14F0F982DD555E | 2 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-21 | storm5510 | 8C14F0F982DD555E | 2 | 608432 | 1 | 3 | | Verified | Certified Good | 2022-09-26 | Perig | F318FD1CAEE79D3B | 3 | 702070 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-09-26 | curtisc | CERT | Proof certified good | | 2022-09-26 | Perig | C-PRP | Proof Certified Good
Proof Power: 7
| | 2022-09-21 | seatsea | F-ECM | Factor: 72456663302202959749993 / ECM curve 3, B1=50000, B2=38914785, Montgomery Sigma=1235779854703618 | | 2017-11-21 | storm5510 | C-PRP | M2258863/76801343/155590483441 : 8C14F0F982DD555E | | 2017-10-10 | Oliver Kruse | C-PRP | M2258863/76801343/155590483441 : 8C14F0F982DD555E | | 2016-04-14 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2008-07-14 | George Woltman | F-ECM | Factor: 155590483441 |
|
