1) PRP proofs.  This allows GIMPS to double-check a PRP test at less than 1% of the cost of a full PRP test! 
   PRP proofs require lots of temporary disk space.  See readme.txt for details. 
   PRP proofs require uploading a large proof file.  See readme.txt for details. 
   PRP proof verifications require downloading a modest verification file.  See readme.txt for details. 
2) Proofs automatically uploaded to server in 30.2. 
3) First time LL, World-record LL, 100M-digit LL work preference is deprecated. 
4) New resource limits menu choice and dialog box.  Consult readme.txt before making changes to these settings. 
   Some options previously in Test/Worker Windows and Options/CPU are moved to the resources dialog box. 
5) LL-DC and PRP-DC combined into a single work preference. 
6) Warning raised if temporary disk space is less than 1.5GB -- you may not get first time prime tests. 
7) Thanks to Mihai Preda, the P-1 probability calculator has been improved.  This change results in a 
   lower optimal B1 value and higher optimal B2 value.
 
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