1. bigmath
I just sent Rob (and put up on my page:
http://www14.brinkster.com/matthewlewis/projects.html ~ 220K ) a new lib for
doing math with really big numbers (up to nearly 10,000 digits precision).
It stores numbers very compactly, and most operations are not done using
string math.
This was something that I've been wanting to do for a while. Kat's bignum.e
sorta brought this to the surface again. BTW, Kat, I was getting some bad
results from your string math routines (I tried to use them at first, but
went ahead and rolled my own).
It's got add/sub/mult/div operations, plus mod, root, power and compare
routines.
Matt Lewis
2. Re: bigmath
On 11 Nov 2002, at 11:29, Matthew Lewis wrote:
>
>
> I just sent Rob (and put up on my page:
> http://www14.brinkster.com/matthewlewis/projects.html ~ 220K ) a new lib for
> doing math with really big numbers (up to nearly 10,000 digits precision). It
> stores numbers very compactly, and most operations are not done using string
> math.
>
> This was something that I've been wanting to do for a while. Kat's bignum.e
> sorta brought this to the surface again. BTW, Kat, I was getting some bad
> results from your string math routines (I tried to use them at first, but went
> ahead and rolled my own).
Oh. I didn't get any feedback from you on it, can you send me what caused
errors, please, so i can track them down? That was plainly labeled
prerelease, i hope no one was relying on it.
Kat
3. Re: bigmath
Maybe this is a bug but I am unsure...
I changed bigmath.exw to
d1 = "12345678901234567895555555555555555555555555555555555555"
d2 = "23"
Then I got
12345678901234567895555555555555555555555555555555555555 * 23 =
283950614728395061597777777777777777777777777777777777765
time: 0.17
12345678901234567895555555555555555555555555555555555555 / 23 =
4398405781969369595351282556717245438888.83660007247219861602941362441840573
time: 0.05
12345678901234567895555555555555555555555555555555555555 mod 23 =
12345678901234466732222570260054862476056751058910461131
time: 0.18
Why is the last test can be larger than 23?
Thanks for the library.
______________________________________________
M> I just sent Rob (and put up on my page:
M> http://www14.brinkster.com/matthewlewis/projects.html ~ 220K ) a new lib for
M> doing math with really big numbers (up to nearly 10,000 digits precision).
M> It stores numbers very compactly, and most operations are not done using
M> string math.
M> This was something that I've been wanting to do for a while. Kat's bignum.e
M> sorta brought this to the surface again. BTW, Kat, I was getting some bad
M> results from your string math routines (I tried to use them at first, but
M> went ahead and rolled my own).
M> It's got add/sub/mult/div operations, plus mod, root, power and compare
M> routines.
M> Matt Lewis
