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News of the research projects that Gridcoin pays for and of the Gridcoin releases, newest first. Press releases that companies pay to publish here are in the list too, marked as sponsored: Gridcoinstats does not write them and does not stand behind what they say.
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3,637- has been factored into 85-digit and 127-digit prime numbers. In other news, the National Science Foundation XSEDE grant has been renewed for another year, so we have lots of sieving to do! We can use as much computing time as you have available to donate, and your help is greatly appreciated!
The composite cofactor of the RSA public key factored into 91-digit and 97-digit prime numbers. With these factors, we are able to decrypt the RSA-encrypted literary quote. What quote did Donald Knuth hide so well? His remarks (as reported) were as follows:-- "O Rowty-owty tiddly-owty Tiddly-owty tiddly-owty Highty-ighty tiddly-ighty Tiddly-ighty ow." --G. K. Chesterton (1905) This is from The Tremendous Adventures of Major Brown, the first in the collection of short stories The Club of Queer…
3,635+ has been factored into 94-digit and 99-digit prime numbers. The RSALS merger is going smoothly, and we have already factored 10 RSALS-sized numbers!
As announced on their website, the RSALS project is merging into NFS@Home. The RSALS infrastructure has been integrated into NFS@Home, including the familiar Current jobs page. Also, Lionel from RSALS will continue to administer this subproject. If you wish to only participate in RSALS projects on NFS@Home, then make sure to enable only the lasieved app in your NFS@Home Preferences. However, if your computer has sufficient memory, you are welcome to contribute to the harder projects as well…
The numerator of Bernoulli(200) has been factored into 90-digit and 115-digit prime numbers. The final processing was done by Emmanuel Thome and Paul Zimmermann with CADO-NFS using the Grid 5000 platform.
In the second volume of The Art of Computer Programming, Donald Knuth included a puzzle. A literary quotation is encrypted using the RSA algorithm, and we will decrypt it by factoring the public encryption key! This effort will use the lower-memory lasievee application, so more of you will be able to participate. The workunits for this challenge start with Gtaocp, and they will start going out shortly. Let's crack this as quickly as possible!
2,1061- has been factored into 143-digit and 177-digit prime numbers. This is a new record for the largest ever SNFS factorization, and is a new Cunningham champion in three categories!
3,625- has been factored into 72-digit and 135-digit prime numbers. The new Mac OS X and FreeBSD apps are working well. If you have had trouble with NFS@Home on these platforms in the past, I encourage you to give us another try!
For FreeBSD fans, a native FreeBSD app has been released for x86_64 processors. It should work with FreeBSD 7+ as long as the COMPAT_FREEBSD7 kernel option has not been disabled. Thanks go to FreeBSD Daemon for his assistance in creating this port.
197,113- is now factored into 117-digit and 141-digit prime numbers.
7,365- is now factored into 97-digit and 125-digit prime numbers.
59,149- is now factored into 101-digit and 162-digit prime numbers. The sieving of B200 is complete and postprocessing has begun, and 7,365- will likely finish this weekend.
After learning more than I wanted to know about compiling in Mac OS X, the 64-bit sieve now supports OS X 10.5+. If you are using OS X 10.5, please give it a try and report any problems that you experience. Thanks!
A 64-bit Mac OS X app has been released. It uses less memory and is much faster than the older 32-bit app for Mac. Note that this was built with Xcode 4.0, and requires Mac OS X 10.6 Snow Leopard or greater. It will not run with 10.5 Leopard.
10,305+ is now factored into 75-digit and 135-digit prime numbers. The sieving of 2,1061- is nearly complete. (Really this time!) The sieving of B200 is going well, and once the sieving of 2,1061- is done the V5 applications will also be used to sieve B200. Let's get B200 done as quickly as possible!
Barry Mazur and William Stein wish to include the factors of the numerator of the 200th Bernoulli number in their upcoming book, and you can help! This is a large GNFS factorization, but NFS@Home has the ability to sieve it in 2-3 months. Therefore, I am placing 2,1019- on hold for a bit. If you have the memory for it please use the lasievef application help factor B200, and let's complete it as quickly as possible!
As predicted, 11,290+ finished today. It has been factored into 91-digit and 110-digit prime factors.
5,433+ has been factored into 133-digit and 139-digit prime factors. This sets a third place record for SNFS difficulty and a first place record for largest penultimate factor for the Cunningham project! The sieving of 2,1061- is going well using the new app for 64-bit Linux, as is the sieving of 10,305+ and 2,1019- using the traditional apps. 11,290+ is in postprocessing and should finish this weekend.
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