G'morning David, 

 DW> Anyway, I've been trying to "modularize" the thing, to
satisfy people
 DW> who like programs that way. This version is *nearly* as fast, on my
 DW> machine, as the previous fastest one. Who knows? Maybe on your machine,
 DW> it will be even faster.

Mmmm ... it just clocked in at 4 seconds.


 DW> Incidentally, I haven't shifted away from integers, except in
 DW> that one version where I tried to make it handle *huge*
 DW> numbers. That version was *really* slow!

Errr ... perhaps I meant `long integers'.  Nevertheless, the 
programme is impressively fast - and superbly annotated....

:-))
 
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