quote:
___________________________________________
What do you thing about this?
___________________________________________

I don't think that P-1 factoring is good at all.
- P-1 factoring uses an awful lot of memory
- It's hard to intelligently choose B1 and B2 on P-1 factoring,
and most users will not like the manual work
- Since the candidates have already been sieved to a pretty good
depth, there is a big chance that the remaining candidates
who are composite don't have a factor small enough to be
discovered with P-1 factoring
- Even for the candidates which have a factor small enough to be
discovered with P-1 factoring, the amount of time needed to
eliminate that number could have been used to eliminate 2
candidates by sieving
- The P-1 factoring software is not well optimized and has a lot
of bugs in it, and I think that it would be quite some time before
the software is fully tested.

The only project that does P-1 factoring is GIPMS, and they only
do that because they can't sieve.