Dear Vincent,
Indeed, sagecell <https://sagecell.sagemath.org/> gives the correct answer.
I'm not an expert, so whether I use cygwin I do not know.
Jupyter and Notebook with Windows 8.6 give both segfault.
Notebook 8.6:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_3.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8 -*-\\n"
+
_support_.preparse_worksheet_cell(base64.b64decode("YWE9MTA5NjA0NzU3MTMxMTk0NTYyMjA1MDcxMzE5OTY2NDQ0NTM1ODA3CnByaW50IGlzX3NxdWFyZWZyZWUoYWEp"),globals())+"\\n");
execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File "/tmp/tmpXtAFoN/___code___.py", line 4, in <module>
exec compile(u'print is_squarefree(aa)
File "", line 1, in <module>
File
"/opt/sagemath-8.6/local/lib/python2.7/site-packages/sage/arith/misc.py", line
2852, in is_squarefree
return e.is_squarefree()
File "sage/rings/integer.pyx", line 5859, in
sage.rings.integer.Integer.is_squarefree
(build/cythonized/sage/rings/integer.c:35954)
File "cypari2/gen.pyx", line 3347, in cypari2.gen.Gen.issquarefree
cysignals.signals.SignalError: Segmentation fault
Sage 6.9 notebook (via Window, thus 32 bit) yields the correct answer!
Vincent, I hope this information helps.
Roland
Op zondag 3 maart 2019 11:53:17 UTC+1 schreef vdelecroix:
>
> Hi,
>
> I can not reproduce (I am using Linux). Let me copy your traceback
> that was a mess because of linebreaks
>
> ---------------------------------------------------------------------------
>
> SignalError Traceback (most recent call
> last)
> <ipython-input-35-801031bbe3a3> in <module>()
> 1 aa=Integer(109604757131194562205071319966444535807)---->
> 2 print is_squarefree(aa)
> /opt/sagemath-8.6/local/lib/python2.7/site-packages/sage/arith/misc.pyc
> in is_squarefree(n)
> 2850
> 2851 try:->
> 2852 return e.is_squarefree()
> 2853 except AttributeError:
> 2854 pass
> /opt/sagemath-8.6/local/lib/python2.7/site-packages/sage/rings/integer.pyx
> in sage.rings.integer.Integer.is_squarefree
> (build/cythonized/sage/rings/integer.c:35954)()
> 5857 False
> 5858 """->
> 5859 return self.__pari__().issquarefree()
> 5860
> 5861 cpdef __pari__(self):
> cypari2/gen.pyx in cypari2.gen.Gen.issquarefree()
> SignalError: Segmentation fault
>
> This seems to be a problem with cypari2 in cygwin (could you confirm
> that you are using cygwin?). If so, you should try to reproduce the
> problem without Sage by launching Python inside cygwin and then
>
> >>> import cypari2
> >>> pari = cypari2.Pari()
> >>> pari(109604757131194562205071319966444535807).issquarefree()
>
> Vincent
>
> Le 03/03/2019 à 11:44, Rolandb a écrit :
> > Hi, the following result is probably not intended:
> >
> > Sage 8.6 Windows
> >
> > aa=109604757131194562205071319966444535807
> > print is_squarefree(aa)
> >
> >
> ---------------------------------------------------------------------------SignalError
>
> Traceback (most recent call
> last)<ipython-input-35-801031bbe3a3> in <module>() 1
> aa=Integer(109604757131194562205071319966444535807)----> 2 print
> is_squarefree(aa)
> > /opt/sagemath-8.6/local/lib/python2.7/site-packages/sage/arith/misc.pyc
> in is_squarefree(n) 2850 2851 try:-> 2852 return
> e.is_squarefree() 2853 except AttributeError: 2854 pass
> >
> /opt/sagemath-8.6/local/lib/python2.7/site-packages/sage/rings/integer.pyx
> in sage.rings.integer.Integer.is_squarefree
> (build/cythonized/sage/rings/integer.c:35954)() 5857 False
> 5858 """-> 5859 return self.__pari__().issquarefree()
> 5860 5861 cpdef __pari__(self):
> > cypari2/gen.pyx in cypari2.gen.Gen.issquarefree()
> > SignalError: Segmentation fault
> >
> >
> > Roland
> >
> >
>
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