[QUOTE]41287 total expos. You could have looked on-line for a prime lister program. Or written a bute force one for this range. I happened to have one on my HDD. That with a quick line count (via excel). Viola!

[url]http://primes.utm.edu/links/[/url][/QUOTE]

Uncwilly, you are a god among men! I looked for such an online lister but could not find one. Evidently I am not that good at searching.

18505 are still unresolved in this range, per primenet again: [url]http://v5www.mersenne.org/report_factoring_effort/?exp_lo=332192831&exp_hi=332999999&bits_lo=0&bits_hi=99&txt=1&B1=Get+Data[/url]

And using excel to count.

And all to 64 bits already....

Where can I find such a program to download or is there a way to just script from number x to n and count how many primes? Any list I find has them in multiple columns. Thanks.

I recommend Pari/GP (Google it).

[quote=Primeinator;177019]Where can I find such a program to download or is there a way to just script from number x to n and count how many primes? Any list I find has them in multiple columns. Thanks.[/quote]

If you just want to count primes in range, [url=bbuhrow.googlepages.com]YAFU[/url] can do that (up to 2^32). It used to be able to list them out as well, but evidently I disabled that option :unsure:. There are win32 binaries you can download.

[QUOTE=Primeinator;177019]Where can I find such a program to download [/QUOTE]You should find some if you follow the links at [url]http://primes.utm.edu/links/[/url] (in posts 11 & 12 above :big grin:).

Chris Caldwell's site has "The nth prime page" which is excellent -- but I must admit I can;'t remember who actually wrote it!

[QUOTE=Primeinator;177019]Where can I find such a program to download or is there a way to just script from number x to n and count how many primes? Any list I find has them in multiple columns. Thanks.[/QUOTE]
I find that using excel, I can cut and paste a list into a blank spreadsheet and use the END down-arrow sequence to see the last element, the line number is the count. Or use the open function to open a text file and it does the same thing.

Attached is Luigi's primelister program (DOS mode), it is designed to make a text file to be a worktodo type file.

I think the old bsd games package for unix/bsd/linux systems has a primes command that will list any range of primes at least up to 32 bits.

[quote=CRGreathouse;177046]Chris Caldwell's site has "The nth prime page" which is excellent[/quote]
I second this recommendation.
[url]http://primes.utm.edu/nthprime/[/url]
[quote=CRGreathouse;177046]but I must admit I can;'t remember who actually wrote it![/quote]
[QUOTE]The text of this page, the programs, and all of the necessary data sets were provided by Andrew Booker.[/QUOTE]

Additional power/watts to run
 

[quote=Prime95;176980]Be sure to let them know that it costs money to run this project. A rough estimate is 50 watts per machine.[/quote]

Speaking of, I've got a question regarding this. If you have an older CPU w/o the newer power management / cpu power scaling features, running mprime under Linux should not cause the CPU to use more power, right?

In this case I'm thinking of some P3s I have at some colos.

The servers are on 24/7 anyway for dns, email, webserving and the like, and as far as I can tell don't support any cpu power scaling.

Second, if a newer CPU does support cpu power scaling, is there any way to get mprime to be intelligent about the cpu power scaling? For instance, when I'm just typing on IRC or reading a webpage, my CPU is mostly sitting at 800MHz. If I do something more intense, it may ratchet up to 1600 or I think peak at 2000 MHz.

I wouldn't mind running mprime, but I don't want it to cause the cpu power scaling to go up. In other works, if the load I'm generating has room for mprime to do some crunching within the 800MHz of idle, then I wouldn't mind it taking the idle cycles - so long as it doesn't bump the cpu power scaling up to 1000MHz or whatever. It appears my CPU supports "100mhzsteps", but I've never seen it run below 800MHz.

I think if mprime or prime95 or whatever did support this sort of intelligence and power saving with cpu power scaling and idle -> suspend/hibernate wasn't impacted, then places like a University would gladly accept running such a client.