I think I found out why my C81 and C85  factorizations failed
yesterday.

I just ran a C81 again today via the new notebook interface and noticed
that when it got to about 8000 relations (about 15 minutes later), the
log file was inaccessible. It complained that q was not defined.

I tried running a different factorization and it said rp was not
defined.

Basically after a certain amount of time it seems to reset everything
that has been defined.

The process QuadraticSieve belonging to asok on SAGE.math seems to
continue using 100% of the processing resources that it was before, but
never terminates, and the notebook sits there waiting as though it were
still expecting to get an answer from it one day.

Smaller factorizations on the other hand terminate normally before
everything "times out" in the notebook.

I just did the same  C81 computation from the command line on SAGE.math
and it went past the 10000 relation stage no problems. I'll let it run
right to the end and ensure that it is actually terminating.

I should try a C85, but I really need to put Laczos in or the linear
algebra will dominate the time.

Bill.


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