Use factorint()
>>> from sympy import *
>>> factorint(50)
{2: 1, 5: 2}
Aaron Meurer
On Jun 21, 2009, at 2:52 PM, Sebastian Haase wrote:
>
> Hi Sympy group,
> many of you are obviously reading the scipy mailing list ...
> So I just wanted to hear your comments on the posting below:
> I looked up the home page of NZMATH
> and was wondering how it compares to sympy ?
> Obviously their stuff about rational numbers and polynomials exists in
> sympy, so how about the factorization part !?
>
> Regards,
> Sebastian Haase
>
> PS: hope to see some of you in Leipzig this year
>
> [SciPy-user] prime factorization...
>> Hi all,
>> Is there any function in scipy that gives the prime factorization?
>> ie 50 -> [5, 5, 2]?
>> TIA
>> Cheers,
>>> --
>>> Fred
>>
>> Let me tell you there is another solution: NZMATH
>> http://tnt.math.metro-u.ac.jp/nzmath/index.html
>> which is written in Python.
>>>>> import nzmath.factor.methods as methods
>>>>> dir(methods)
>> ['DefaultMethod', 'EllipticCurveMethod', 'MPQSMethod',
>> 'PMinusOneMethod', 'RhoMethod', 'TrialDivision', '__builtins__',
>> '__doc__', '__file__', '__name__', 'arith1', 'bigrange', 'ecm',
>> 'ecmfind', 'factor', 'find', 'mpqs', 'mpqsfind', 'pmom', 'prime',
>> 'rhomethod', 'trialDivision', 'util']
>>>>> methods.factor(50)
>> [(2, 1), (5, 2)]
>>>>> methods.factor(18440000000000000000)
>> [(2, 18), (5, 16), (461L, 1)]
>> Regards,
>
> >
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