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Old 2021-07-22, 09:40   #403
Brownfox's Avatar
Dec 2017

73 Posts

What rules of thumb are people using to decide how much ECM to do before embarking on NFS?

For instance, the last composite for (6,10) is a c177 for GNFS, or a c209 for SNFS Quartic. I've done ECM up to 50 digits (7556 curves at B1=43E6). Is this sufficient or would you expect some curves at 55 digit level?
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