| 2475857 | Composite, with 4 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 120 / 280 |
Estimated T-Level: 22.1 ⓘ TF below 2^69 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Robert Martin | 44C385807D78A974 | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | 1999-07-12 | Steinar H. Gunderson | 44C385807D78A974 | 2072457 | 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) | 2017-10-14 | Oliver Kruse | 9F5829FD3169695C | 3 | 1251796 | 5 | 3 | | Factored | PRP without proof (not generated) | 2017-11-29 | storm5510 | 9F5829FD3169695C | 3 | 1652429 | 5 | 3 | | Verified | Certified Good | 2025-05-08 | feather | 9F5829FD3169695C | 4 | 2473819 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-05-10 | Zitong Zhang | CERT | Proof certified good | | 2025-05-08 | feather | C-PRP | M2475857/827825891236285511/2067845463777277033/6567147716799416561/392237976463644111791 : 9F5829FD3169695C Proof Certified Good
Proof Power: 7
| | 2025-05-08 | feather | F-ECM | Factor: 392237976463644111791 / ECM curve 33, B1=67884, B2=20787525, Edwards Sigma=4059706162799064 | | 2022-03-10 | LordJulius | NF | no factor TF: 61-62 | | 2018-09-28 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-11-29 | storm5510 | C-PRP | M2475857/827825891236285511/2067845463777277033/6567147716799416561 : 9F5829FD3169695C | | 2017-10-14 | Oliver Kruse | C-PRP | M2475857/827825891236285511/2067845463777277033/6567147716799416561 : 9F5829FD3169695C | | 2016-08-22 | TJAOI | F | Factor: 6567147716799416561 | | 2016-03-09 | TJAOI | F | Factor: 2067845463777277033 | | 2003-10-31 | Team Prime Rib | NF-PM1 | B1=15000, B2=228750 | | 2003-10-14 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-07-27 | -anonymous- | C-LL | 44C385807D78A974 | | 1999-07-12 | -anonymous- | C-LL | 44C385807D78A974 | | 1999-05-02 | -anonymous- | NF | no factor TF: 1-59 |
|
