[seqfan] Re: Final nonzero digit of n!.

Graeme McRae g_m at mcraefamily.com
Fri Apr 16 04:59:44 CEST 2010


It might be interesting to consider the last nonzero digit of n! in  
other bases. To start the ball rolling, I have developed a clever  
algorithm for finding elements of A000012, the last nonzero digit of  
n! in base 2.

--Graeme McRae,
Palmdale, CA,
Sent from my iPhone

On Apr 15, 2010, at 11:43 AM, Fritz Jacob <fritzjacob at gmail.com> wrote:

> Please find the solution attached.
>
> best regards,
> Fritz Jacob
>
>
>
> On Thu, Apr 15, 2010 at 9:11 PM, T. D. Noe <noe at sspectra.com> wrote:
>
>>> I didn't get any response till now, can I take that as
>>> "no more methods exists other than the two I mentioned"?
>>>
>>> The reason I asked this question was, I happen to derive a formula  
>>> for
>> this
>>> while solving a puzzle on wilmott forum
>>>
>>> http://wilmott.com/messageview.cfm?catid=26&threadid=75596&STARTPAGE=2
>>>
>>>
>>> 1) Can someone please verify my proof? (I am software engineer,  
>>> not very
>>> familiar with math)
>>> 2) Is this interesting enough to try for publishing?
>>
>>
>> It would be useful to put your method into the e-mail instead of  
>> having
>> everyone make sense of that website.
>>
>> Best regards,
>>
>> Tony
>>
>>
>
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>
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