[seqfan] R: Re: What is the base 36 log of 10077696?

[surianonoi5 at libero.it]

In winmaxima 5.11 ratsimp(log(100776096)/log(36)) gives 9/2
Carmine

>----Messaggio originale----
>Da: petsie at dordos.net
>Data: 19/04/2011 2.23
>A: <seqfan at list.seqfan.eu>
>Ogg: [seqfan] Re: What is the base 36 log of 10077696?
>
>Am 19.04.2011 01:01, schrieb Alonso Del Arte:
>> What is the base 36 log of 10077696?
>>
>> Mathematica says (ln 10077696) / (ln 36), which numerically evaluates
>> to 4.5, which then led me to try 36^(9 / 2), which indeed evaluates to
>> 10077696. In the much smaller example log_4 8, Mathematica unhesitantly 
says
>> 3 / 2. I'm wondering if there is some subtlety I have missed, or if maybe
>> machine precision makes some kind of difference here.
>>
>> Al
>>
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>
>I guess Mma does not try factoring for numbers > 10^6. If told so, it 
>tries hard:
>
>In[1]:= Log[36,10077696]//FullSimplify
>Out[1]= 9/2
>
>Cheers,
>Peter
>
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