Interesting lets compare louies and yours...

12250000 12500000 louie 107
11780000 11930000 louie 44

Basically Louie P-1'ed a range of 400000 n and produced 151 factors.

0.3775 factors per 1000 n-range

11600000 11770000 engracio 30
12000000 12020000 engracio 8
11400000 11600000 engracio 51

E P-1'ed a total range of 390000 n and produced 89 factors.

0.228 factor per 1000 n-range.

Louie used a B1=95K with B2=B1x11.5
E used a B1=75K with B2=B1x11

Basially Louie spent close to 30% more processing power per k/n pair, yeilding a 65% increase in factor probability.

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Very interesting, E you might want to try higher bounds say B1=110k and if you are not limited in memory and have dual channel try upping your B2:B1 ratio. I wouldn't go much beyond 14.

B2=1500000

Are you still running those MPX's?

The most important point to remember is a little P-1 is better than no P-1 so as long as we are not passing ranges...