Bob Margulies skrev: > A few hours ago, Prime95 version 23.8.1 reported M32091881 is not prime > and appears to have gone directly to LL testing of M27471827 without > doing any factoring. Is that OK? Usually factoring takes at least a day.
Regarding the factoring discussion, quoting from whatsnew.txt: > New features in Version 24.12 of prime95.exe > -------------------------------------------- > > [---] > > 3) The factoring breakeven points have been recalculated using my 2 GHz P4. > This version of prime95 will do less trial factoring. In version 24.12 of Prime95 the default factoring depth of Prime95 was changed. Trial factoring is normally done as a separate work type and then handed out to someone else for the Lucas-Lehmer test. (See menu Test/PrimeNet for types of work to request.) P-1 factoring is done just before the Lucas-Lehmer test and not assigned separately. If the trial factoring is done by someone with version 24.12 or newer, then when the Lucas-Lehmer test is assigned to you your client (v 23.8) might decide to do the trial factoring one bit deeper before starting on the P-1 factoring and L-L test. On the other hand, if trial factoring was done by someone with a client older than v 24.12, then your Prime95 client would start the P-1 factoring and L-L test directly. The new client also chooses lower P-1 bounds if the number has been trial factored deeper (as compared to what is normal for the new client). I don't know what the bounds are compared to the old client. A line in worktodo.ini like Test=35263819,62,0 means a first-time Lucas-Lehmer test of M35263819, where trial factoring has been done to 62 bits depth and P-1 factoring has not been done. (Last number is 1 when P-1 is done.) -- Patrik Johansson http://www.bahnhof.se/~pjoh/index.html _______________________________________________ Prime mailing list [email protected] http://hogranch.com/mailman/listinfo/prime
