The speed of mmffgfn is similar to mmff, but roughly a chunk 4e1210e12 for some N~=70 is probably ~ 1 hour on GTX570, and a chunk 2e1210e12 for some N~=120 is maybe a few hours. So you may want to take them by N ranges of multiples of 10 easily.
It would be nice to take everything initially to k<=10e12. Remember, the success probability* is ~ 1/kN * O(some pesky logs), so you may probably want the low k's.
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*per unit of time! ... or even ~ 1/kN^{2}
Last fiddled with by Batalov on 20121016 at 06:08
Reason: (footnote)
