>
> Incidentally I observe that Sympy has the same behavior, so we can't
> just nick their factoring algorithm -- maybe some other package we can
> try the same example to see if any of them handle it quickly?
>
> best
>
> Robert Dodier
>
> Hi, I have tried the factorization with giacpy. (cf trac 12375). I had to
expexpand first before factoring and did this:
sage: from giacpy import libgiac
sage: x=libgiac('x')
sage: s=exp(1024*(x+1))-1
sage: %time s.expexpand().factor()
CPU times: user 0 ns, sys: 0 ns, total: 0 ns
Wall time: 1.32 ms
(exp(x+1)-1)*(exp(x+1)+1)*(exp(x+1)^2+1)*(exp(x+1)^4+1)*(exp(x+1)^8+1)*(exp(x+1)^16+1)*(exp(x+1)^32+1)*(exp(x+1)^64+1)*(exp(x+1)^128+1)*(exp(x+1)^256+1)*(exp(x+1)^512+1)
or
sage: %time s.expexpand().factor().expexpand()
CPU times: user 4 ms, sys: 0 ns, total: 4 ms
Wall time: 1.13 ms
(exp(x)*exp(1)-1)*(exp(x)*exp(1)+1)*((exp(x)*exp(1))^2+1)*((exp(x)*exp(1))^4+1)*((exp(x)*exp(1))^8+1)*((exp(x)*exp(1))^16+1)*((exp(x)*exp(1))^32+1)*((exp(x)*exp(1))^64+1)*((exp(x)*exp(1))^128+1)*((exp(x)*exp(1))^256+1)*((exp(x)*exp(1))^512+1)
best
Frederic
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