[Cado-nfs-discuss] [error] caused by a larger special-q

canny georgina cannysiska at gmail.com
Mon Jul 23 03:25:05 CEST 2018


Hi, I've found one more trouble faced during lattice sieving. I've done it
on c110 and it works fine until 96.8 % until it shows error like this:

lient localhost
Info:HTTP server: 127.0.0.1 Sending workunit c110_sieving_67120000-67130000
to client localhost
Info:Lattice Sieving: Adding workunit c110_sieving_67210000-67220000 to
database
Info:Lattice Sieving: Adding workunit c110_sieving_67220000-67230000 to
database
Info:Lattice Sieving: Found 497 relations in
'/tmp/cado.5tpo3b5l/c110.upload/c110.67090000-67100000.60wlf51j.gz', total
is now 4380971/4528085
Info:Lattice Sieving: Marking workunit c110_sieving_67090000-67100000 as ok
(96.8% => ETA Sat Jul 21 07:45:48 2018)
Error:Lattice Sieving: Program run on localhost failed with exit code 1
Error:Lattice Sieving: Stderr output follows (stored in file
/tmp/cado.5tpo3b5l/c110.upload/c110_sieving_67110000-67120000.gtwetumb.stderr0):
b'ERROR: The special q (27 bits) is larger than the large prime bound on
side 1 (26 bits).\n       You can disable this check with the
-allow-largesq argument,\n       It is for instance useful for the
descent.\n'

the command that I run is like this:
root at ubuntu:/home/chunnie/Desktop/Math3/cado-nfs# ./cado-nfs.py
35794234179725868774991807832568455403003778024228226193532908190484670252364677411513516111204504060317568667
tasks.polyselect.import=c110_nonlinear.poly tasks.sieve.I=13

does this error imply that i got to add   -allow-largesq to the end of the
command?

Thank you
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