VBCurtis:
The values of k I'm working on are all sieved to pmax=12T yet, with nmax=10M.
If you want to do n=0...2M, then pmax=4T should be quite sufficient.
One could also think of using SBFactor to do some P1 factoring on candidates with n>1M.
I did some trials but found the sieving still more efficient. Maybe SBFactor will get another chance at even larger values of n.
 Thomas
