| 1657 | Composite, with 1 known prime factor. Cofactor is PRP (Probable-Prime). Trial Factored to 268 TF target 244 |
| Factored | |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Unknown | 5FAE | 0 | Unknown,(aka U) | | Factored | | George Woltman | 3CCD6323222BDFAE | 0 | Woltman,Prime95,first web release,(aka W4) | | Factored | | Gord Palameta | 3CCD6323222BDFAE | 724 | Linux 32-bit,Prime95,v23,(aka WZ2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | No proof (small exponent) | 2017-11-16 | kkmrkkblmbrbk | PRP_PRP_PRP_PRP_ | 1 | 0 | 1 | 3 | | Factored | No proof (small exponent) | 2017-11-16 | kkmrkkblmbrbk | PRP_PRP_PRP_PRP_ | 1 | 409 | 1 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2017-11-16 | kkmrkkblmbrbk | P-PRP | M1657/10788426156438350117334292343137689257142387557947087583
PRP Cofactor | | 2010-06-13 | -anonymous- | F-ECM | Factor: 10788426156438350117334292343137689257142387557947087583 | | 2009-03-27 | klajok | NF-PM1 | B1=30000000000, B2=3000000000000, E=12 | | 2008-12-06 | Matthias Wurtinger | NF-PM1 | B1=10000000000, B2=20000000000, E=12 | | 2002-12-25 | -anonymous- | NF-PM1 | B1=4290000000 | | 2002-10-19 | Alex Kruppa | NF | no factor TF: 1-57 | | 2002-09-29 | Alex Kruppa | NF | no factor TF: 1-57 | | 2002-09-14 | Alex Kruppa | NF | no factor TF: 1-57 | | 2002-09-14 | -anonymous- | NF-PM1 | B1=3221225472, B2=4290000000, E=48 | | 2002-08-03 | -anonymous- | NF-PM1 | B1=2147483648, B2=4290000000, E=48 | | 2002-05-25 | -anonymous- | NF-PM1 | B1=1073741824, B2=4290000000 | | 2001-05-20 | -anonymous- | NF-PM1 | B1=3000000000, B2=4290000000 | | 2001-02-11 | -anonymous- | NF-PM1 | B1=10000, B2=1000000 | | 2001-02-11 | -anonymous- | NF-PM1 | B1=1000000, B2=100000000 | | 2000-07-17 | -anonymous- | NF | no factor TF: 1-56 | | 2000-01-19 | -anonymous- | NF | no factor TF: 54-55 | | 1999-12-15 | -anonymous- | NF | no factor TF: 53-54 | | 1999-09-14 | -anonymous- | NF | no factor TF: 52-53 | | 1999-09-14 | -anonymous- | NF | no factor TF: 50-51 | | 1998-07-05 | -anonymous- | NF | no factor TF: 50-52 |
|
