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From: Peter Otten <__peter__@web.de>
Subject: Re: (-1)**1000
Date: Wed, 22 Oct 2014 13:02:09 +0200
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Xref: csiph.com comp.lang.python:79431

Michiel Overtoom wrote:

> 
> On Oct 22, 2014, at 12:29, Peter Otten wrote:
> 
>> That looks like log(a) while a parity check takes constant time:
>> $ python3 -m timeit -s 'a = 10**10' 'a & 1'
> 
> 
> Do you mean 'parity' as in http://en.wikipedia.org/wiki/Parity_bit ? 
> Because a parity bit denotes whether the *number* of '1' bits is even or
> odd, not the value of the least significant bit.

No, I meant the lsb. The OP introduced the term 'parity'; not sure if that 
was erroneous, too, or if there is an angle to the problem that escapes me.