Current status

[xilman]

Originally Posted by Jushi

For people like me who never do any of this: what kind of size of memory and disk are we talking about?

A few gigabytes.

The sizes, per se, aren't particularly bad in comparison with modern disks. A problem is that some filesystems have a maximum file size of, say, 2GB.

Another problem is that some operating systems have a maximum contiguous virtual address space of 1GB or so (vanilla 32-bit Windows XP) or 2GB (common on other 32-bit operating systems) or something under 3GB (32-bit Windows XP booted in /3gb mode).

Paul

[Jushi]

Originally Posted by xilman

Another problem is that some operating systems have a maximum contiguous virtual address space of 1GB or so (vanilla 32-bit Windows XP) or 2GB (common on other 32-bit operating systems) or something under 3GB (32-bit Windows XP booted in /3gb mode).

I guess in this case, the only solution is to run 64-bit software. If your program allocates 3GB of RAM, you are getting close to the theoretic limit of 4GB in a 32-bit program. You cannot really blame the OS for this. Of course, you can also change the software not to allocate so much virtual memory (you could use a ramdisk file system to store data, this should be almost as fast as simply malloc()ating memory, especially if you mmap() the file).

[R.D. Silverman]

We have another ECM "near" miss.

2,1550L = p52.p130

p52 = 2204849283056077770183700917441626363341403201988701

I omit the p130 here.

The Linear algebra for 6,281- is about 75% done and 5,329- has finished
sieving. I am starting to do 6,305-, but do not know if I will get to
finish it. I am still waiting for my office to be moved.