About
Prime Numbers are of great interest to mathematicians for a variety of reasons. Primes also play a
central role in the cryptographic systems which are used for computer security. Through the study of Prime Numbers it can
be shown how much processing is required to crack an encryption code and thus to determine whether current security
schemes are sufficiently secure.
PrimeGrid is currently running several sub-projects:
- Primegen: generating a public sequential prime number database (end phase).
- Twin Prime Search: searching for
gigantic
twin primes of the form k*2n + 1 and
k*2n - 1.
- Cullen-Woodall Search: searching for
mega primes of forms n*2n + 1 and
n*2n - 1.
- 3*2^n-1 Search: searching for
mega primes of the form 3*2n - 1.
- Prime Sierpinski Project: helping Prime Sierpinski Project solve
the Prime Sierpinski Problem.
Recent Significant Primes
On 23 Mar 2008, 7:57:28 UTC, PrimeGrid, in collaboration with 321 Search found another Mega Prime:
3*24235414-1
The prime is 1,274,988 digits long and enters
The Largest Known Primes Database ranked 14 th overall.
This is 321 Search's first mega prime and 11 th prime overall. It is the second largest found mega-digit prime using LLR. The discovery was made by Dylan Bennett of Canada using an Intel C2D @ 1.66 GHz with 2GB RAM.
This computer took almost 15 hours and 30 minutes to complete the primality test.
Other recent record primes
Known Issues
- Twin Prime Search, Cullen/Woodall Prime Search and Prime Sierpinski Project Sieve does not support Windows 9x/Me.
- Primegen and Cullen Prime Search subprojects do not support Linux.
- Results sometimes crash with computation error.
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PrimeGrid User of the Day
 UBT - NaRyan  Bringing peace through power, To the world of BOINC. :)
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News 
2008-05-07 15:45 UTC Problems saving preferences
We are aware of the issues saving your preferences (the message states that the changes have been saved, which doesn't actually happen), and are working to resolve the issue. It has been reported that logging out and in again helps, so you might try that as a workaround.
UPDATE: as of 16:00 UTC preferences saving should work.
2008-04-30 13:55 UTC Sieve WU lengths increased
In an attempt to lower the size of the database, we have increased the WU length to both the PSP Sieve and GCW Sieve projects. WU's are now 1.5X as long...so a 6 minute WU now takes 9 minutes. Credit has been adjusted accordingly.
2008-04-26 17:00 UTC Workunit deadlines increased
The deadlines for subprojects that have very long workunits have been increased to 12 days. The subprojects affected are Woodall Prime Search, Cullen Prime Search, 321 Prime Search and Prime Sierpinski Project (all LLR).
2008-04-23 20:00 UTC Standalone screensaver application published for testing
Nicolas has posted a standalone PrimeGrid screensaver application which is going to be included within the next science application update. We are looking for people to try it out on their computers so that we know it runs fine before we publish it project-wide.
Visit the thread in the forums to find more about it.
2008-04-23 11:00 UTC Can you survive for 24 hours without your computer?
It is obvious that without computers we would find our life extremely difficult, maybe even impossible. If they disappeared for just one day, would we be able to cope?
Be part of one of the biggest global experiments ever to take place on the Internet. The idea behind Shutdown Day is to find out how many people can go without a computer for one whole day, and what will happen if we all participate!
Shutdown your computer on 03 May 2008 and find out! Visit shutdownday.org and join the campaign!
(And before you ask - no, PrimeGrid server isn't going down on that day)
Last 24 hoursTop participants by credit granted in the last 24 hoursTop teams by credit granted in the last 24 hours |
