mersenneforum.org - View Single Post - GMP-ECM vs mprime for F12?

mathwiz · 2019-03-09, 23:44

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?

2019-03-09, 23:44	#1
mathwiz Mar 2019 2⁴·3² Posts	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?