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Old 2020-05-16, 19:27   #6
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Jun 2012

55758 Posts

Originally Posted by VBCurtis View Post
There is a theoretical property of NFS for determining degree. However, the poly-search capabilities of the software influence this also- deg 6 is simply harder to search than deg 5.
While using CADO, I've found the deg 4/5 cutoff to be just under 100 digits, and deg 5/6 to be around 215.
In past GNFS poly searches, a deg 6 has never been used for anything under C206 (per the limited data in best scores table and the C190+ NFS jobs thread). Parallel searches in deg 5 and 6, as well as lots of test sieving were involved for C206-215.

Last fiddled with by swellman on 2020-05-16 at 19:28
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