20071127, 13:37  #1 
(loop (#_fork))
Feb 2006
Cambridge, England
13×491 Posts 
Bizarre problem with gnfslasieve4I15e
I'm trying to work out optimal parameters for a rather large SNFS job, and was led, out of a desire to pull lots of relations out of each specialQ so that I wouldn't have to run specialQ well into the area of diminishing returns, to build gnfslasieve4I15e by replacing
Code:
all : $(BINDIR)/gnfslasieve4I12e $(BINDIR)/gnfslasieve4I13e \ $(BINDIR)/gnfslasieve4I14e Code:
all : $(BINDIR)/gnfslasieve4I12e $(BINDIR)/gnfslasieve4I13e \ $(BINDIR)/gnfslasieve4I14e $(BINDIR)/gnfslasieve4I15e But I found that this gave me fewer relations when I used a smallprime bound of 80 million than when I used one of 70 million. The input file is below; I just ran 'gnfslasieve4I15e a job' Code:
n: 27312187167948796049898887842782596405655381943670578373120353781997447000328700858938482409418918448758778194857586271196003004729048486053340769161697167767956404785889687728602979284674332324623675660860406658739006337124213538943374972682241 type: snfs skew: 1 c6: 2 c0: 1 Y1: 1 Y0: 1393796574908163946345982392040522594123776 alim: 70 or 80 million rlim: 70 or 80 million lpba: 30 lpbr: 30 mfba: 62 mfbr: 62 alambda: 2.6 rlambda: 2.6 q0: 100000000 qintsize: 10000 Code:
77588747,213413649:41fe9f3,4eeceeb,642B,9991,1D98D,32E883,90F4A3,1D69,D,89:d809cef,16d10281,4E541,5BFC27,B92861,A7,ACF,5F5E1DF The algebraicside factors (spot the specialQ) are Code:
[167 1] [2767 1] [320833 1] [6028327 1] [12134497 1] [100000223 1] * [226532591 1] [382796417 1] Code:
[13 1] [137 1] [7529 1] [25643 1] [39313 1] [121229 1] [3336323 1] [9499811 1] [69200371 1] [82759403 1] 
20071127, 17:12  #2 
Tribal Bullet
Oct 2004
3537_{10} Posts 
Grepping through the lattice siever source, most of the machinespecific versions of lasieve/*/siever_config.h define L1_BITS to be 14, so I suspect the lattice size cannot exceed this number. Maybe you can increment L1_BITS and recompile?

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