For me, with SageMath version 9.8.beta7
sage: ecm.factor(71281426948143699070565)
does not return quickly either.
Indeed, running
sage: ecm.interact()
seems to show a strange behaviour for 71281426948143699070565 when
factoring the factors found.
As this is probabilistic and the output changes
Thanks Dima, you taught me something new today.
Guillermo
On Sun, 29 Jan 2023 at 20:50, Dima Pasechnik wrote:
> On Sun, Jan 29, 2023 at 3:04 PM G. M.-S. wrote:
> >
> > For me, with SageMath version 9.8.beta7
> > sage: ecm.factor(71281426948143699070565)
> > does not return quickly either.
> >
Hi,
I have a hard time factoring the number 71281426948143699070565 using
ecm.factor(). No result is given after a few minutes runtime. Though,
plain factor() happily factors the number. Factoring smaller or larger
numbers work fine with ecm.factor(), too. Just the single given number
On Sun, Jan 29, 2023 at 3:04 PM G. M.-S. wrote:
>
>
> For me, with SageMath version 9.8.beta7
>
> sage: ecm.factor(71281426948143699070565)
>
> does not return quickly either.
>
> Indeed, running
>
> sage: ecm.interact()
>
> seems to show a strange behaviour for 71281426948143699070565 when
dim...@gmail.com schrieb am Sonntag, 29. Januar 2023 um 20:50:29 UTC+1:
Basically, the default B1 value is too large in this case.
sage: ecm.factor(71281426948143699070565,B1=200) # almost instant
[5, 53, 337, 1873, 2833, 7507, 20037791]
sage: ecm.factor(71281426948143699070565,B1=2000) #
Hello,
I've been trying to build Sage 9.8 from source for development; I had
previously done so months ago, but I had not been able to do rebuild Sage
since pulling from the GitHub repository around late December/early
January. I've deleted the previous source/build directory that I had to try
