Thanks, I forgot to remove M=Nest that was beneficial in my previous attempts where I used 3 Nests. But remember: Never forget that it is a waste of energy to

Thanks, I forgot to remove M=Nest that was beneficial in my previous attempts where I used 3 Nests. But remember: Never forget that it is a waste of energy to do the same thing twice, and that if you know precisely what is to be done, you need not do it at all. --- E. E. ``Doc'' Smith (1930) ...the optimal solution avoids all pattern. --- Douglas Hofstadter (1983) http://djm.cc/bignum-results.txt http://djm.cc/bignum-results.txt So I would recommend to avoid things like f@f@f@f@a where there is clearly a pattern.