Great, thanks Stefan and everyone.

> From: stefanv@berkeley.edu
> To: numpy-discussion@scipy.org
> Date: Fri, 28 Aug 2015 12:03:52 -0700
> Subject: Re: [Numpy-discussion] Numpy FFT.FFT slow with certain samples
>
>
> On 2015-08-28 11:51:47, Joseph Codadeen <jdmc80@hotmail.com>
> wrote:
> > my_1_minute_noise_with_gaps_truncated - Array len is
> > 2646070my_1_minute_noise_with_gaps - Array len is 2649674
>
> In [6]: from sympy import factorint In [7]:
> max(factorint(2646070)) Out[7]: 367 In [8]:
> max(factorint(2649674)) Out[8]: 1324837
>
> Those numbers give you some indication of how long the FFT will
> take to compute.
>
> Stéfan
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