Warning *** Not all of the Projects have data all of the time.
See http://vcn94.homelinux.org/PRPNet/ for Port Empty status.
The best feature of PRPNet is its FLEXIBILITY.
PRPNet offers many options such as which primality testing programs to run as well as which projects to participate in and which servers to connect to. For example, in the current SR5 PRPNet Challenge, many users have this project configuration:
As you can see, the SR5 project is primary at 100% and requests 2 WU's per connection. In this case, the SGS project is the backup. Should anything happen to SR5 (out of work or server down), PRPNet will then request work from the SGS project at 1 WU per connection.
Although the SGS project has 0 share, PRPNet will select it if there's no work from other active projects. This safeguards your host from going idle. While it may not be doing work from the project you selected, at least it's still being productive and doing work.
Therefore, in the below configuration (which is set up for SR5 primary and all the rest as backup), it would be very difficult for a host to go idle. In the list, there are 15 projects (1 primary at 100% and 14 backup at 0%). There are 4 servers (prpnet.primegrid.com, pgllr.mine.nu, prime2u.com, and uwin.mine.nu) located at different locations.
The chances of all projects going empty and all servers going down is extremely remote. Of course, if the host internet connection goes down, there's not much we can do. ;)
// The following servers are from PrimeGrid
// For descriptions of each project, please see this post:
// Additional servers from PrimeGrid
Additionally, as of this past week, PSP has updated their server to the latest PRPNet version making it available:
// The following servers are from the Prime Sierpinski Project
And at the conclusion of the SR5 PRPNet Challenge, SR5's server can be added as a backup:
// The following server is from the Sierpinski/Riesel base 5 Project