Check your sieving speeds. People have reported 64 bit sieving to be 2.5 times faster than 32 bit sieving. I've extended your limit to Jan 15th, but can extend it again if you need it. Lennart also has experienced a slowdown. If you have split your ranges into subranges, and/or can easily keep track of things, submit your factors as you go at http://sr5.psp-project.de/sieveimport.php. Don't worry if you submit them twice (or more) the page will let you know what is new and what is not. That way we get the maximum benefit of the factors. They will immediately remove k n pairs from testing, but don't worry if you can't do it easily. Have fun!