2,763,451

2,486,541

last 6 number chosen by randomly stabbing at the key pad with my eyes closed. took a few attempts as I don't think "/" "+" or Num Lock are valid numeric digits.

its 2,007,068

easy 2,398,573

My guess is:  2,987,654

I know. After counting them there is 2,636,437

1 lb of material / 30 minutes of cutting X 1 hour to see it was coded wrong + 1 trip to store for new vaccum bag = 2,389,473 to the 12 power of chips

Hmmm,

2,456,394

my guesstimate: 2,758,904

475 chips per inch of travel
.1 step over
70% of 2 x 2 x 3.5 removed
about 1.3 x 2 x 3.5 removed
20 passes length-wise for each .25 plunge
6 plunges to get 1.3" depth.
1 finish pass

8 parts.

About 459,800 chips

found math mistake