2016-07-14, 20:25 | #1 |
Jul 2016
1_{2} Posts |
Assignment credits?
Hi, I'm new to prime95... I've tried to find information on this but I've been unable to, or I've read over it...
I'm currently running a LL first test for an exponent - if this was to find a prime, would I get credit at the end of this test (which is up to 2^79 for this exponent) and then a potential award once it's been checked by over users? Another question, I'm running an exponent on a slower PC that seems to be taking 53 times longer? And in prime95 it says stage 1 is x% complete, how many stages are there? |
2016-07-15, 04:40 | #2 | ||
6809 > 6502
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Aug 2003
101×103 Posts
3^{2}×1,193 Posts |
First and foremost, welcome to the search for Mersenne Primes! Hope you enjoy yourself.
Let's see if we can get you the answers are looking for: Quote:
If it is found to be prime on your machine, it will be double and triple checked on different kinds of machines using different programs written by different people. If all of these show that it is prime, then process of pursuing the EFF award starts. Quote:
Stage 1: This makes me think that your machine is doing P-1 factoring. This and TF are done before LL testing to check for factors. With these test we can eliminate over 60% of the exponents by finding factors. It is a wise investment of time to take the numbers to certain bit levels and P-1 bounds before LL testing. P-1 has 2 stage with each of these having 2 phases. Once P-1 is complete, then the LL test will start. If an exponent has previously had enough TF and P-1 done on it, Prime95 will start the LL directly. Last fiddled with by Uncwilly on 2016-07-15 at 04:43 |
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2016-07-15, 06:26 | #3 | ||
Romulan Interpreter
"name field"
Jun 2011
Thailand
2·3·5·337 Posts |
Quote:
Quote:
Another idea is that you start first with double-checking smaller exponents, which will be good for you as a beginner, from three points of view: first, they finish faster (because the exponents are smaller) giving you a small satisfaction (and some fast "credits"), second, you can get a residue which you compare with the other guy who did initial test, and in this way you know that your hardware is working properly, and it is apt to do the longer LL tests, and third, during this testing period, you learn how the things are going here around. More info about P-1, LL, DC, etc., you can find on gimps' math page. Edit: crosspost with Unc, I had this page open since morning (lunch break here now) but no time to write, and didn't see you posted, sorry. Last fiddled with by LaurV on 2016-07-15 at 06:31 |
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