==> arithmetic/digits/power.two.s <== Let v = log to base 10 of 2. Then v is irrational. Let w = log to base 10 of these 9 digits. Since v is irrational, given epsilon > 0, there exists some natural number n such that {w} < {nv} < {w} + epsilon ({x} is the fractional part of x.) Let us pick n for when epsilon = log 1.00000000000000000000001. Then 2^n does the job.