| Proth Search Page |
Yves Gallot wrote an excellent Windows program which makes it easy for anyone to find record size or otherwise interesting primes, but this creates a problem: without a coordinated effort, many of us were be searching the same ranges of numbers for primes! Some spent hundreds of hours checking ranges that were already known to be barren. So I have begun this page in order to reduce this unnecessary duplication. Please join us in the search!
Here is how it will work. PrimeGrid will reserve large ranges of k and n. It will perform both a first test and a double-check of all candidates. When it is within weeks of completing this reservation, it will place another reservation for a smaller range of k and n. Of note, some of these ranges will overlap ranges currently reserved to other searchers. PrimeGrid will NOT SEARCH those ranges. The standard ProthSearch policy is that each searcher has two months to complete any reservation. That policy will not be changed. If you have a reservation that is not completed within two months, that range will be available for PrimeGrid to search.
If you are concerned about any of this, please contact Mark Rodenkirch immediately.
| Proth primes | Definition and status
Recently reserved ranges Reserve or submit a range email me at logon {at} prothsearch.net for the username and password from a valid email address. List of primes for k < 300 List of primes for 300 < k < 600 List of primes for 600 < k < 900 List of primes for 900 < k < 1200 |
| Primes k.2n - 1 | List of primes for k < 300 |
| Cullen primes | Definition and status |
| Woodall primes | Definition and status |
| The Sierpinski problem | Definition and status |
| The Riesel problem | Definition and status |
| Fermat numbers | Standard factoring status Factors of generalized Fermat numbers |
You might want to check out the following pages for more information on primes!
Here are a few links to programs to aid in the search for primes:
Here are some links to other prime searches:
These prime searches do not appear to be active:
Thanks to Chris K. Caldwell, Yves Gallot, Wilfrid Keller, and Mark Rodenkirch for their help and encouragement in developing this web site. Sincere gratitude is extended to Leonid Durman for suggesting and writing macros to greatly reduce the size of the search range pages!
If you have any questions about this web-site, you can e-mail Ray Ballinger or Mark Rodenkirch.