#3237: update ecm to 6.2.1
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Reporter: mabshoff | Owner: mabshoff
Type: defect | Status: assigned
Priority: major | Milestone: sage-3.2.1
Component: packages | Resolution:
Keywords: |
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Changes (by mabshoff):
* cc: zimmerma (added)
Comment:
Man, this ticket has gone stale, so I will hopefully fix it soon.
Anyway: Paul, I have been seeing the following on occasion in Sage 3.x for
a while:
{{{
sage -t -long devel/sage/sage/interfaces/ecm.py
**********************************************************************
File "/scratch/mabshoff/release-cycle/sage-3.2.1.alpha2/devel/sage-
main/sage/interfaces/ecm.py", line 317:
sage: ecm.factor((2^197 + 1)/3) # takes a long time
Expected:
[197002597249, 1348959352853811313, 251951573867253012259144010843]
Got:
[251951573867253012259144010843, 265748496095531068869578877937]
**********************************************************************
}}}
What happens in that case was that ecm did not finish quickly, but spend a
long, long time burning 100% CPU until I killed it via top for example.
Then the above output was printed. Is this something I should be concerned
about? Will the 6.2.1 release fix this? The problem happens on occasion,
i.e. maybe a percent of the tries, but I have no exact numbers.
Cheers,
Michael
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/3237#comment:2>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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