Far too much interest in prime M(p). Composite M(p) - that's where the future is - more of them. Somewhat to my surprise, I seem to have been the discoverer since 1983 of the largest known composite M(p), namely M(M(31)). That's 21 years - and you've got no chance of that if you go chasing prime M(p). And all without the aid of gymnasia or fancy drugs. Amazing what you could do with an evening's mainframe idle time and a short program in bc. Of course, I could be wrong: if so, do let me know. Guy :-)