While we're on the subject, can someone explain how to derive the group
order for factors found using ECM? I've been carrying out ECM on an old PC
for almost a year now, and I'd like to be able to derive, and factorise,
the group orders for the factors that I've found.
I've been making an effort
I've been carrying out ECM for some time now on small exponents (under
40,000) and I'm curious about the amount of memory that it uses.
According to readme.txt, the minimum memory required is 192 times the FFT
size. For the exponents I'm looking at, I suspect that the FFT size is of
order a
