Comment #2 on issue 1881 by mattpap: solve -> OverflowError: mpz too large
for int
http://code.google.com/p/sympy/issues/detail?id=1881
This is all interesting, as I can't reproduce the OverflowError.
On my 1.7 GHz Centrino laptop factorization of numerator of 'f' takes less
than 3s
with gmpy ground types (SYMPY_GROUND_TYPES=gmpy bin/isympy) and more than a
minute
with python ground types(SYMPY_GROUND_TYPES=python bin/isympy). In polys8
branch the
default is now gmpy.
I will need cooperation from to see why it fails on your computer. Could
you add a
print statement on line 1143 in sympy/polys/factortools.py (or just
before 'if
K0.is_Algebraic:'), so that I could see what polynomial went into
dmp_factor_list()
(it should be just the numerator of 'f'). With gmpy ground types you should
get
something like this:
[[[[[mpq(-21601054687500000000L)], [], [], [], [], [], [], [], []]],
[[[]]], [[[]]],
[[[]]], [[[]]], [[[]]], [[[]]], [[[]]], [[[]]]], [[[[]]]] and so on ...
Also I need to know what are the default ground types used in your session.
To check
this issue ZZ.dtype and QQ.dtype in isympy.
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