[racket] Math library ready for testing

Unfortunately, Maxima seems to be distributed under the GPL, which
means that we can't easily just take their code and add it to Racket.

Sam

On Tue, Dec 11, 2012 at 8:52 AM, Jens Axel Søgaard
<jensaxel at soegaard.net> wrote:
> 2012/12/11 Jens Axel Søgaard <jensaxel at soegaard.net>:
>> 2012/12/11 Jens Axel Søgaard <jensaxel at soegaard.net>:
>>> Here is what Maxima does (line 628 and below):
>>>
>>> https://github.com/andrejv/maxima/blob/master/src/ifactor.lisp
>>
>> I have attached a port in the attached file. The new primality
>> tester is called new-prime? and the old one prime?.
>> The old one seems to be faster on the simple
>> "sum primes below a million test".
>>
>> (time (for/sum ([n (in-range 1000000)]
>>                 #:when (new-prime? n))
>>         n))
>>
>> ; cpu time: 31264 real time: 31427 gc time: 340
>> ; 37550402023
>>
>> (time (for/sum ([n (in-range 1000000)]
>>                 #:when (prime? n))
>>         n))
>>
>> ; cpu time: 8944 real time: 9079 gc time: 257
>> ; 37550402023
>>
>> --
>> Jens Axel Søgaard
>
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