20200415, 10:48  #1 
(loop (#_fork))
Feb 2006
Cambridge, England
13·491 Posts 
Yields with 16e
This is a 16e factorisation of a GNFS200.0 number (and about a third complete)
I am a little surprised that, with alim=rlim=400M, I'm seeing the yield increasing monotonically as Q goes down all the way from 300M to 200M ... I've generally expected the peak yield to be roughly at Q=lim Maybe I should start this kind of large job by sieving 1M slots at 20M intervals then filling in the gaps. Much narrower sieve regions will just pick up Poisson noise rather than a 10% yield difference. Actually the noise is much worse than Poisson, because there's a roughly Poisson process at each prime ideal plus nonuniform distributions of the prime ideals; if I fit a linear trend to the yield and look at then the median is about seven. Last fiddled with by fivemack on 20200415 at 10:49 
20200419, 13:45  #2  
(loop (#_fork))
Feb 2006
Cambridge, England
13×491 Posts 
Quote:
Last fiddled with by fivemack on 20200419 at 14:08 

Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Zero/low yields in KF siever @~67M (badsched bug)  Batalov  Factoring  38  20150209 07:57 
M(57885161) yields no primitive trinomial over GF(2)  ewmayer  Computer Science & Computational Number Theory  5  20130606 02:50 