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Old 2019-03-09, 23:44   #1
mathwiz
 
Mar 2019

12710 Posts
Default GMP-ECM vs mprime for F12?

I've been playing a bit with GMP-ECM vs. mprime for the remaining C1133 of F12.

It seems mprime's ECM mode is way faster (3 hours vs. 6+) on my Xeon. Why is this? Does it have some particular optimizations for Fermat numbers, the use of gwnum, something else?
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