| 2611597 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 226 / 280 |
Estimated T-Level: 24.0 ⓘ TF below 2^75 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Eric Prestemon | 8247B749C915CD33 | 0 | Windows,Prime95,v14,NT service,(aka WQ5) | | Factored | 1999-04-13 | Massimo Montalto | 8247B749C915CD33 | 2368361 | Windows,Prime95,v18,(aka WU1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2017-10-15 | Oliver Kruse | 9B7AADE39653876D | 1 | 924059 | 5 | 3 | | Factored | PRP without proof (not generated) | 2017-12-02 | storm5510 | 9B7AADE39653876D | 1 | 1188947 | 5 | 3 | | Verified | Certified Good | 2025-08-15 | feather | 9B7AADE39653876D | 2 | 2283611 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-08-15 | Fabrice Bellet | CERT | Proof certified good | | 2025-08-15 | feather | C-PRP | M2611597/21896693510360750777/154095138574335412444409 : 9B7AADE39653876D Proof Certified Good
Proof Power: 7
| | 2025-08-15 | feather | F-ECM | Factor: 154095138574335412444409 / ECM curve 8, B1=67149, B2=7923582, Edwards Sigma=420292805306516 | | 2022-03-11 | LordJulius | NF | no factor TF: 1-60 | | 2019-07-04 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-12-02 | storm5510 | C-PRP | M2611597/21896693510360750777 : 9B7AADE39653876D | | 2017-10-15 | Oliver Kruse | C-PRP | M2611597/21896693510360750777 : 9B7AADE39653876D | | 2009-02-27 | dachshund | F-ECM | Factor: 21896693510360750777 | | 2009-01-30 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-11-08 | Team Prime Rib | NF-PM1 | B1=15000, B2=217500 | | 2003-10-31 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-04-13 | -anonymous- | C-LL | 8247B749C915CD33 | | 1999-03-26 | -anonymous- | NF | no factor TF: 1-59 |
|
