Henk Stokhorst wrote:
>L.S.,
>
>Just curious, what makes factoring 13.388.659 take four times as
>long as 13.375.793?
It's because 13,388,659 is past the cutoff of 13,380,000 where
Prime95 starts factoring to the depth of 2^65 instead of 2^64.
Normally, increasing the depth by a factor of one only doubles
the time required. However, because of the nature of chip architecture, it
takes a longer period of time than normal
above 2^62 and again above 2^64 to do the necessary
calculations (more instructions and such).
Eric
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