Scoring is explained here:
http://www.aooq73.dsl.pipex.com/
The middle test is in the DC active window, thus it will soon save us a DC test.
The other tests are way in front of us, just scoring p/100T, as you've noticed. The "Score could be" column tells you how much points you will get once the active window has increased so much that it now includes the resp. test.
There are as well some tests between DC active window and main active window. Scoring outside the active window is the same, whereas scoring once the DC active window reaches them is only 60% of what one would get for the main active window, as one PRP test has already been done.
The "Factors next to enter ..." tables show which tests soon fall into the active windows, thus the score will increase somewhat, as that is the time the found factors indeed save us a test (or even 2, as it's the case with the main window).
Example:
Take the first line of "Factors next to enter (main) 'active window' (@n=7309623)":
Code:
385.055T 22699 7736230 3.851 Sun 10-Oct-2004 72016.460
Once the upper bound of the main active window reaches n=7736230 (which will take approx. 55 days with current PRP production), the factor's test is in the main active window (which means that soon, it really will save a test) and the score will be changed to 72016.460
The main reason for this scoring schema are the factorers, as they output less factors per time, but factors that almost definitely (see below) saves a test in a few days, whereas factors found with sieving could be worthless for years (n=19M won't be reached soon). If a prime for that k is found in the meantime, the factor is completely worthless. The chance that this happens to 'P-1 factored' factors is very low.
Hope this is understandable...