mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Software

Reply
 
Thread Tools
Old 2003-05-17, 15:37   #1
uniqueidlondon
 

23×139 Posts
Default When do I know if the number is prime?

Does the program tell you whether a factor as been found?

Or does it not reveal this information until the end.

Also, my iteration times range between .678 (slowest) to .288 fastest How does this compare to other Pentium III machines. I feel I am running a little slow.

Thanks.

ANDY
  Reply With Quote
Old 2003-05-17, 16:57   #2
S80780
 
Jan 2003
far from M40

53 Posts
Default

Hi, ANDY!

Yes, the program does tell you, whether a factor was found or if the mersenne you tested is prime. You can look up the meaning of program outputs in readme.txt and in the Online Help.
In case of P-1ing, First Time Tests or DCs, you have to wait till the end of the test.
In case of Trial Factoring, the program might look for factors smaller than the current one to determine the smallest one. But it won't start a new bit depth. So again you have to wait "nearly" till the end.

To compare your timings to others, you can take a look at the benchmarks-page on http://www.mersenne.org/bench.htm.

Cheers,

Benjamin
S80780 is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
(M48) NEW MERSENNE PRIME! LARGEST PRIME NUMBER DISCOVERED! dabaichi News 571 2020-10-26 11:02
Number of distinct prime factors of a Double Mersenne number aketilander Operazione Doppi Mersennes 1 2012-11-09 21:16
Estimating the number of prime factors a number has henryzz Math 7 2012-05-23 01:13
new prime number? Artifex Information & Answers 2 2008-12-31 07:58
New prime number? inthevoid2 Information & Answers 3 2008-09-29 23:27

All times are UTC. The time now is 03:17.

Wed Dec 2 03:17:34 UTC 2020 up 83 days, 28 mins, 1 user, load averages: 1.72, 1.61, 1.55

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.