Yes: "the Nines". ;-) You didn't choose something which is prime. Primes end up being the number over the requisite number of Nines (and can't be simplified). T

Yes: "the Nines". ;-) You didn't choose something which is prime. Primes end up being the number over the requisite number of Nines (and can't be simplified). The point of my game was to find simplifications. That's how I ended up asking myself "how can I predict how long a repeating decimal is?" and backed into the observation about 1/17 and its ilk. 3 is trivial because 9 is 3^2. 7 is a trick question because it happens to coincidentally be a factor of 999999. At my current rate of progress with this hobby, I might have something interesting to report in another decade or so.