Berkeley CSUA MOTD:Entry 11644
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2025/05/24 [General] UID:1000 Activity:popular
5/24    

2004/1/2 [Computer/HW/Memory, Computer/HW/CPU] UID:11644 Activity:high
1/1     I got a IBM R40e recently with windows Xp.  I'm wondering what I should
        run (if anything) to stress the computer out.  I heard that if a
        laptop is going to break it's going to break in the first few months of
        use.  Should I worry about this?  I'd much rather ship this back in
        30 days to the seller rather than deal with IBM warranty.  Thanks.
        \_ setiathome
           \_ bah. recent games are still generally the things that work a
              computer the most.
              \_ In terms of actual stress testing, not really.
              \_ yeah goof point. seti only stresses the CPU.
        \_ Video editing and reencoding.
        \_ I had a Dell Inspiron that had an overheating GeForce GPU --
           only found out after playing Flashpoint on it for a day.
           It also took two or three exchanges with Dell before they figured
           it out.
        \_ M$ Fight Simulator in demo mode with highest randering options.
           That's how I stressed a PC I bought a few years ago.  Turned out
           that it hung after 15min or so and it was a CPU problem.
        \_ Prime 95 has a good stress mode, not for the video card though. It
           was able to detect faulty CPU operation when overclocked, even though
           stuff would appear to run ok. http://mersenne.org.  You have to run the
           specific stress test. Some people run two instances.
        \_ is it just me or it seems like modern computers are less fault
           tolerant than ever?
           \_ It's just you. Personal computers are much more fault tolerant
              now than they used to be. Apparently you've never run an AppleII
              or a C64. People's expectations change and they forget about the
              recent past. It would have been ludicrous during the dawn of the
              PC era to think that a C64 could have uptimes of months. You were
              lucky if it didn't bugger out after a couple hours. You can't
              compare today's multipurpose PC to mainframes of the past because
              that's like comparing apples with oranges. The fact is that PCs
              have essentially replaced mainframes because they have become
              increasingly more fault tolerant to the point that they can be
              reasonably used in an enterprise market. That doesn't mean that
              they are as fault tolerant as a mainframe, but the fact is that
              you can keep a Linux/BSD x86 box running for months shows the
              vast improvement over time of the OS and the hardware archtiecture
              of PCs.
              \_ By "fault tolerant" was the poster asking about how often
                 something goes wrong, or how likely the machine keeps going
                 after something has gone wrong?
           \_ Not all modern computers are designed to be fault tolerant. If you
              have a plain Pentium IV and non-ECC RAM, you aren't getting the
              greatest reliability but probably enough for most people. With a
              Xeon and ECC RAM, you get better data integrity in both the CPU
              and from the RAM. Enterprise storage equipment has more. I guess
              data integrity isn't the same thing as the real fault tolerant
              stuff on servers like RAID and other redundancy, which is what
              you would need to tolerate disks, psus, cpus etc. going bad.
2025/05/24 [General] UID:1000 Activity:popular
5/24    

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mersenne.org
It is kind of pricey because accurately printing an over-sized poster in 1-point font is not easy! Makes a great present for the serious math nut in your family. The Cunningham project is trying to complete the factorization of 2^n-1 and 2^n+1 where n < 1200. To do this they need to find as many "small" factors as possible using ECM. Computers of all speeds are welcome, but this project is ideal for slower computers because primality tests on large Mersenne numbers can take months to complete. Note for performance reasons Pentium 4 computers should only test 2^n-1 numbers. Version 238 corrects this problem by using full URLs instead of relative URLs. Athlon and Pentium 3 users get a small speed increase too. GIMPS has finished testing and double-checking all Mersenne numbers below M6972593. This proves there are no smaller undiscovered Mersenne primes. Here you can chat with fellow GIMPS members, get help with installation questions, learn more about how GIMPS works, etc. You could discover one of the most coveted finds in all of Mathematics - a new Mersenne prime number. GIMPS will distribute this award if we are lucky enough to find a ten million digit prime. Prime numbers have long fascinated amateur and professional mathematicians. An integer greater than one is called a prime number if its only divisors are one and itself. For example, the number 10 is not prime because it is divisible by 2 and 5 A Mersenne prime is a prime of the form 2^P-1. GIMPS, the Great Internet Mersenne Prime Search, was formed in January 1996 to discover new world-record-size Mersenne primes. GIMPS harnesses the power of thousands of small computers like yours to search for these "needles in a haystack". Most GIMPS members join the search for the thrill of possibly discovering a record-setting, rare, and historic new Mersenne prime.