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## Re: Ruler, compass and prime power

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• ... if((1 + 256*I)^137 == BC + AB*I, print( need a smaller compass )); need a smaller compass David
Message 1 of 33 , Nov 1 4:44 AM
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"mikeoakes2" <mikeoakes2@...> wrote:

> Exercise 3: Consider a triangle with
> AB =
> 73101071671289523538653859196886988013103939433655...
> BC =
> 43338757552919245553882386423601066153210393129188...
> and ABC a right angle. Explain how to 137-sect the angle
> CAB using only ruler and compass.

if((1 + 256*I)^137 == BC + AB*I, print("need a smaller compass"));

need a smaller compass

David
• ... I saw that, thanks David! Since this is a list dedicated to primes, I ll also just mention briefly that yafu has one of the fastest sieve of Eratosthenes
Message 33 of 33 , Nov 8 7:07 PM
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--- In primenumbers@yahoogroups.com, David Cleaver <wraithx@...> wrote:
>
>

>
> Ben, I've been trying to tell them how awesome Yafu is! You can see my message
> here:
>
> If anyone needs any factoring utilities, yafu should be first on the list. Then
> some combination of yafu/msieve/ggnfs to factor larger numbers. I tried to
> spell it all out in the above post. Hopefully I didn't misrepresent any info
> about yafu. Please correct me if I was wrong. If anyone has any questions,
> feel free to ask on this list.
>
> -David C.
>
> P.S. For full disclosure, I helped contribute a small amount of code to yafu. :)
>

I saw that, thanks David!

Since this is a list dedicated to primes, I'll also just mention briefly that yafu has one of the fastest sieve of Eratosthenes implementations I'm aware of, for generating lists of primes in arbitrary ranges up to 10^19. Maybe that is useful to folks here too.

cheers,
- ben.
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