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But basically I don't think it is a good idea to skip numbers exeptIt's not just storage you save, it's also computation.
multiples of two. With the three you save a sixth of memory, with
the five you save a 15-th and at the end you get about 20% less
storage (1 / (2 * 3) + 1 / (2 * 3 * 5) + 1 / (2 * 3 * 5 * 7) ...)
for a lot of computation. That's the point where I dropped this
idea and I think this extra computation is higher than the time
for the saved memory loads.
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