Sun Users, I tried the Mlucas_2.7x compiled with Sun's f90 version 2 and compared this against MacLucasUNIX v6.20. On the two ranges of exponents I tried Mlucas was about 15% slower than MacLucasUNIX, using 256k and 512K FFTs. Currently I'm double checking some exponents around 4,100,000 and doing LL testing on some around 8,300,000. One advantage Mlucas might have over MacLucasUNIX is that it can do FFT sizes other than 2^n, but even using the 224K and 448K FFTs for these exponent sizes, it was slower than MacLucasUNIX by about 8%. So for now SPARC users should probably stick to MacLucasUNIX, but I will look at the relative speeds again once MacLucasUNIX starts using a 1024K FFT, Mlucas' ability to do 640K and 768K FFTs should give it a speed advantage for quite a long time. Of course, MacLucasUNIX might also be faster by then :-) The compiler options I used were:- -fast -libmil -xlibmopt -xarch=v9 I'm happy to try this again if someone can suggest a better set of options. Putting -xarch=v9 does make Mlucas run faster on systems that support it. Bill Rea, Information Technology Services, University of Canterbury \_ E-Mail b dot rea at its dot canterbury dot ac dot nz </ New Phone 64-3-364-2331, Fax 64-3-364-2332 /) Zealand Unix Systems Administrator (/' _________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
