Difference between revisions of "User:Chrax"
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| + | ==About Me== | ||
I am a [[Discoverers|Discoverer]] at the Academy. I am a programmer with moderate skill in [http://www.perl.com perl] and am beginning with C. I also know Java, but I don't consider that to be to my credit. I'm also interested in math, politics/religion (debates are fun at times) and education. | I am a [[Discoverers|Discoverer]] at the Academy. I am a programmer with moderate skill in [http://www.perl.com perl] and am beginning with C. I also know Java, but I don't consider that to be to my credit. I'm also interested in math, politics/religion (debates are fun at times) and education. | ||
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GCS/M/ED/S d- s++: a--- C++ L+++ P++ E W++ N+ K w-- O- V-- PS+ PE- Y+ t X+ R- tv b++ D--- G++ e- h- r* y | GCS/M/ED/S d- s++: a--- C++ L+++ P++ E W++ N+ K w-- O- V-- PS+ PE- Y+ t X+ R- tv b++ D--- G++ e- h- r* y | ||
| + | ==Contact Me== | ||
I have: | I have: | ||
* A [http://chrax.freezope.org/index.htm website] | * A [http://chrax.freezope.org/index.htm website] | ||
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* An AIM account: chrostephir <defunct> | * An AIM account: chrostephir <defunct> | ||
* An MSN account: chrax25@hotmail.com <defunct> | * An MSN account: chrax25@hotmail.com <defunct> | ||
| + | |||
| + | ==Programming== | ||
| + | ===Current Projects=== | ||
| + | * [http://chrax.freezope.org/programs/c/prime.c Prime Generator] | ||
| + | * LITE ('''L'''ITE '''I'''s a '''T'''ext '''E'''ditor) - In progress (not ready to expose to the world yet) | ||
| + | |||
| + | ===Help Wanted=== | ||
| + | ====Alpha Testers==== | ||
| + | [http://chrax.freezope.org/programs/c/prime.c Prime Generator v.80] is out and I need people that will go out of their way to break it and send me bug reports. I'll get around to creating a makefile by v.81, but for now just <code>gcc -lgmp -Wall -oprime prime.c</code> | ||
| + | |||
| + | Also note that you'll need to change where the files are if you don't want everything in /var/log/prime/. And don't hesitate to suggest features. I can't guarantee that I'll include them, because a) I'm not all that great b) your ideas might not be all that great. | ||
| + | |||
| + | ====Ass-Kicking Primality Test==== | ||
| + | Anybody that wants to take the time to look through the source of prime will see this ugly bit of C: | ||
| + | <table><tr> | ||
| + | <td><code> | ||
| + | mpz_init_set_ui(test,3);<br><br> | ||
| + | while(mpz_cmp(test,root) <= 0){<br><br> | ||
| + | /* int equiv: mod = thisnum % test; */<br> | ||
| + | mpz_mod(mod,thisnum,test);<br><br> | ||
| + | if(mpz_cmp_si(mod,0) == 0){<br> | ||
| + | mpz_clear(root);<br> | ||
| + | mpz_clear(mod);<br> | ||
| + | mpz_clear(test);<br> | ||
| + | return 0;<br> | ||
| + | }<br> | ||
| + | mpz_add_ui(test,test,2);<br> | ||
| + | }<br> | ||
| + | </code></td></tr></table> | ||
| + | and might say "Wow, that's rather brutish, isn't there a GMP primality test or something?" and be quite justified in doing so. Yes there is a GMP primality test <code>mpz_probab_prime_p</code>, but as you might guess from its name, it returns a 1 if it's probably prime. This, frankly, isn't good enough, so until somebody comes up with a good primality test algorithm, we're sticking with the brute force method. | ||
| + | |||
| + | This is where you come in. Recently, [http://www.cse.iitk.ac.in/news/primality_v3.ps three Indians] came up with a deterministic time primality test. The problem is that I don't understand it well enough to implement it, and I don't have the time to spend on it any more. What I need is somebody who can take what they've got and turn it into a useful algorithm, and it doesn't need to be in C, it just needs to be something I can translate into C... say English or [http://www.perl.com perl]. In fact, getting this down would be so big, I expect we could submit it to the [http://www.swox.com/gmp/ GMP] guys to incorporate into a later release. | ||
Revision as of 05:14, 4 January 2005
Contents
About Me
I am a Discoverer at the Academy. I am a programmer with moderate skill in perl and am beginning with C. I also know Java, but I don't consider that to be to my credit. I'm also interested in math, politics/religion (debates are fun at times) and education.
I plan on going to the University of Tulsa and majoring in CS, unless some crazy shit happens and MIT accepts me and pays me a ton of money to go.
I'm also a sysop, so you can email (or talk) me regarding abuses.
I've recently become interested in distributed computing, and I think the Academy has plenty of cycles it is not using. So I encourage you to join a program and start putting your spare processing power to good use.
Participate in the Rotten.com Dead Pool! And check out my profile.
GCS/M/ED/S d- s++: a--- C++ L+++ P++ E W++ N+ K w-- O- V-- PS+ PE- Y+ t X+ R- tv b++ D--- G++ e- h- r* y
Contact Me
I have:
- A website
- A livejournal
- A Blogger
- A gmail
- A jabber account: chrax@jabber.org
- An AIM account: chrostephir <defunct>
- An MSN account: chrax25@hotmail.com <defunct>
Programming
Current Projects
- Prime Generator
- LITE (LITE Is a Text Editor) - In progress (not ready to expose to the world yet)
Help Wanted
Alpha Testers
Prime Generator v.80 is out and I need people that will go out of their way to break it and send me bug reports. I'll get around to creating a makefile by v.81, but for now just gcc -lgmp -Wall -oprime prime.c
Also note that you'll need to change where the files are if you don't want everything in /var/log/prime/. And don't hesitate to suggest features. I can't guarantee that I'll include them, because a) I'm not all that great b) your ideas might not be all that great.
Ass-Kicking Primality Test
Anybody that wants to take the time to look through the source of prime will see this ugly bit of C:
|
and might say "Wow, that's rather brutish, isn't there a GMP primality test or something?" and be quite justified in doing so. Yes there is a GMP primality test mpz_probab_prime_p, but as you might guess from its name, it returns a 1 if it's probably prime. This, frankly, isn't good enough, so until somebody comes up with a good primality test algorithm, we're sticking with the brute force method.
This is where you come in. Recently, three Indians came up with a deterministic time primality test. The problem is that I don't understand it well enough to implement it, and I don't have the time to spend on it any more. What I need is somebody who can take what they've got and turn it into a useful algorithm, and it doesn't need to be in C, it just needs to be something I can translate into C... say English or perl. In fact, getting this down would be so big, I expect we could submit it to the GMP guys to incorporate into a later release.
