"Foghorn Leghorn" <[EMAIL PROTECTED]> observes:
> At Paul Zimmerman's ECM page,
> http://www.loria.fr/~zimmerma/records/ecmnet.html
> the optimal B1 value listed for finding 50-digit factors is 43000000, but
> George's ECM factoring page uses 44000000 for the same purpose. Is one of
> them wrong, or is there a reason for the difference?
If I count the zeros right, these are 43 million and 44 million.
The function being minimized, namely
probability of finding a 50-digit factor on one curve, given that such exists
-----------------------------------------------------------------------------
time per curve
is flat near its minimum. Implementation and platform differences
can obviously affect the denominator (time per curve).
The stage-2 strategy affects the numerator. The two optimal B1's
are close enough to be considered the same.
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