Thanx to all who responded. And special thanx to Sandy Mann for figuring
out
the shortest formulas.
Well, at least the shortest formula for the smallest maximum possible number
at least. When you asked "And is there any limit on the size of the actual
number?", I thought size was a concern of yours, so I posted a formula
deliberately constructed to maximize the number that could be handled.
Teethless mama's maximum number handling was inherent due to the method he
used to construct his formula. Anyway, I'm glad that at least one of our
replies satisfied your requirements.
Rick