Re: Mersenne: C++ Compilers
Since many of us on the list are programmers of one sort or another and interested in numerical analysis also of one sort or another, maybe someone would care to offer an opinion as to which is the better C++ compiler in the Windows environment these days and why. Which compiler is used in the majority of off-the-shelf software. Which has fewer or less serious bugs, etc. I use a lot of matrix operations on huge (3 mil +) 2-d arrays and some compilers really get lost. Which seems to be the most reliable. I've been using Microsoft's Visual C++ The current version, Visual C 6, is quite nice. You will want a fairly powerful development system, lots of memory, disk, CPU speed as its a large package. If you want to really get good mileage out of their integrated development shell, I'd suggest a large screen too (I use a 21" at home and love it.. Work will only buy 17" which are a bit cramped). -jrp
Mersenne: Fast check for common factor?
Hi, I´m thinking about something the would probably be called a stage 2 for my P-1 factorer, i.e. the 3^(E*(p+x)) = 3^(E*p) * 3^(E+x) with x difference between subsequent primes. But I need to check for a factor after every of these steps, and a full-blown GCD would be far too slow. Is there another trick to find out whether two numbers have a common factor (without neccessarily finding the factor itself) ? Ciao, Alex.
Re: Mersenne: C++ Compilers
-Original Message- From: Paul Derbyshire [EMAIL PROTECTED] To: [EMAIL PROTECTED] [EMAIL PROTECTED] Date: Monday, November 16, 1998 3:27 PM Subject: Re: Mersenne: C++ Compilers At 08:02 AM 11/16/98 -0800, you wrote: I've been using Microsoft's Visual C++... YUCK! Ugh, bleah. Microsoft. Blech! -- .*. "Clouds are not spheres, mountains are not cones, coastlines are not -()circles, and bark is not smooth, nor does lightning travel in a `*' straight e."- -- B. Mandelbrot |http://surf.to/pgd.net _ | Paul Derbyshire [EMAIL PROTECTED] Programmer Humanist|ICQ: 10423848| More useless spam.
Re: Mersenne: C++ Compilers
More useless spam. Oh blow it. The whole C++ thread is equally off-topic. And Microsoft itself qualifies as useless spam. -- .*. "Clouds are not spheres, mountains are not cones, coastlines are not -()circles, and bark is not smooth, nor does lightning travel in a `*' straight line."- -- B. Mandelbrot |http://surf.to/pgd.net _ | Paul Derbyshire [EMAIL PROTECTED] Programmer Humanist|ICQ: 10423848|
Mersenne: More Newbie Questions.
Just a couple more I promise. OK my P90 hours are averaged based on actual work done, not work under way, correct? Some of my PCs were initially allocated large exponents 500 and therefore will not be reporting in for some time - the same machines have never checked in. Is this why my count is lower than when I calculate it? Secondly, I have some employees that love their screen savers. By adding the Priority line in prime.ini I plan to increase the productivity of the machine. What should the priority be set atI think screen savers are a 4 or 5 right? Will this cause the screen saver never to activate? More importantly will that slow down my employees productivity due to normal apps running slower? Third, does anyone have good evidence of the prime95 performance increase by going from 128 to 256Mb. Before I shut down our corporate server I would like to know if it's worth it. Thanks guys (and gals?). Steve Gardner Test Point Inc [EMAIL PROTECTED] Browse 83000 Computer Products At www.pcavenue.com Participant In The Great Internet Mersenne Prime Number Search at www.mersenne.org
Re: Mersenne: [meta] List bug, please fix; Yuri Sorkin, your email is phony
At 11:43 PM 11/16/98 +, you wrote: Netscpae Communicator has Reply-to-all Collabra? I am not going to touch it with a ten foot pole. Collabra 4.0 sometimes hangs *the operating system* for no apparent reason. Because of these experiences, I don't trust 4.5 further than I can throw it. -- .*. "Clouds are not spheres, mountains are not cones, coastlines are not -()circles, and bark is not smooth, nor does lightning travel in a `*' straight line."- -- B. Mandelbrot |http://surf.to/pgd.net _ | Paul Derbyshire [EMAIL PROTECTED] Programmer Humanist|ICQ: 10423848|
RE: Mersenne: Off-Topic Posts
One more point... Signatures should be no more than 4 lines. --- William Stuart ([EMAIL PROTECTED]) Si hoc legere scis nimium eruditionis habes
Re: Mersenne: [meta] List bug, please fix; Yuri Sorkin, your email is phony
At 11:42 PM 11/16/98 +, you wrote: No, you don't understand, it is set correctly. Well, it's very inconvenient, annoying, and decidedly non-standard. I'm on about eight mailings lists and the others all dothings the normal way. -- .*. "Clouds are not spheres, mountains are not cones, coastlines are not -()circles, and bark is not smooth, nor does lightning travel in a `*' straight line."- -- B. Mandelbrot |http://surf.to/pgd.net _ | Paul Derbyshire [EMAIL PROTECTED] Programmer Humanist|ICQ: 10423848|
Re: Mersenne: C++ Compilers
I will if everyone else does and we all agree to such a rule. I will not be singled out for special negative treatment however. -- .*. "Clouds are not spheres, mountains are not cones, coastlines are not -()circles, and bark is not smooth, nor does lightning travel in a `*' straight line."- -- B. Mandelbrot |http://surf.to/pgd.net _ | Paul Derbyshire [EMAIL PROTECTED] Programmer Humanist|ICQ: 10423848|
