Discussion related to cado-nfs

[canny georgina <cannysiska@gmail.com>]

Previously, when I'm doing factoring on the c110 using imported polynomial, the problem about the large special-q is somehow solved using the allow_largesq=true option given at the end of the command. After that, sieving has been done up to 100% and then gone to filtering step (duplicate removal, and such..).

However, i found that it stopped halfway (during filtering step) as it shows something like this:

Info:Lattice Sieving: We want 4528085 relation(s)

Info:Lattice Sieving: Reached target of 4528085 relations, now have 4528093

Info:Lattice Sieving: Aggregate statistics:

Info:Lattice Sieving: Total number of relations: 4528093

Info:Lattice Sieving: Average J: 3794.19 for 110295 special-q, max bucket fill -bkmult 1.0,1s:1.448270

Info:Lattice Sieving: Total time: 240010s

Info:Filtering - Duplicate Removal, splitting pass: Starting

Info:Filtering - Duplicate Removal, splitting pass: No new files to split

Info:Filtering - Duplicate Removal, splitting pass: Relations per slice: 0: 2264054, 1: 2264039

Info:Filtering - Duplicate Removal, splitting pass: Total cpu/real time for dup1: 58.14/607.607

Info:Filtering - Duplicate Removal, splitting pass: Aggregate statistics:

Info:Filtering - Duplicate Removal, splitting pass: CPU time for dup1: 605.6s

Info:Filtering - Duplicate Removal, removal pass: Starting

Warning:Command: Process with PID 46510 finished with return code -6

Error:Filtering - Duplicate Removal, removal pass: Program run on server failed with exit code -6

Error:Filtering - Duplicate Removal, removal pass: Command line was: /home/chunnie/Desktop/Math3/cado-nfs/build/ubuntu/filter/dup2 -nrels 2264054 -renumber /tmp/cado.ky9t_u79/c110.renumber.gz /tmp/cado.ky9t_u79/c110.dup1//0/dup1.0.0000.gz > /tmp/cado.ky9t_u79/c110.dup2.slice0.stdout.2 2> /tmp/cado.ky9t_u79/c110.dup2.slice0.stderr.2

Error:Filtering - Duplicate Removal, removal pass: Stderr output follows (stored in file /tmp/cado.ky9t_u79/c110.dup2.slice0.stderr.2):

b'antebuffer set to /home/chunnie/Desktop/Math3/cado-nfs/build/ubuntu/utils/antebuffer\n[checking true duplicates on sample of 27170 cells]\nAllocated hash table of 2716969 entries (10Mb)\nConstructing the two filelists...\n1 files (1 new and 0 already renumbered)\nReading files already renumbered:\nReading new files (using 4 auxiliary threads for roots mod p):\nFatal error in renumber_get_first_index_from_p at /home/chunnie/Desktop/Math3/cado-nfs/utils/renumber.c:981\nIdeal (p, side) = (0xce83705, 0) is bigger that large prime bound 2^25\nFatal error in renumber_get_first_index_from_p at /home/chunnie/Desktop/Math3/cado-nfs/utils/renumber.c:981\nIdeal (p, side) = (0x48f7f67, 0) is bigger that large prime bound 2^25\nFatal error in renumber_get_first_index_from_p at /home/chunnie/Desktop/Math3/cado-nfs/utils/renumber.c:981\nIdeal (p, side) = (0x409c88f, 1) is bigger that large prime bound 2^26\nFatal error in renumber_get_first_index_from_p at /home/chunnie/Desktop/Math3/cado-nfs/utils/renumber.c:981\nIdeal (p, side) = (0x409c88f, 1) is bigger that large prime bound 2^26\n'

Traceback (most recent call last):

  File "./cado-nfs.py", line 122, in <module>

    factors = factorjob.run()

  File "./scripts/cadofactor/cadotask.py", line 5754, in run

    last_status, last_task = self.run_next_task()

  File "./scripts/cadofactor/cadotask.py", line 5829, in run_next_task

    return [task.run(), task.title]

  File "./scripts/cadofactor/cadotask.py", line 3560, in run

    raise Exception("Program failed")

Exception: Program failed

Thank you