How to count a fraction?

Question

Mathematics

I can’t understand how the author got about a hundred. The logarithm gives the number 6, how can a figure close to 100 be obtained there?

Answer 1

Most likely we are talking about the O-notation. That. to the author that 30 seconds, that 100 seconds - without a difference, only its order is important to him, respectively, 30 is rounded up to 100 upwards.

Answer 2

The author is bad at math. Obviously, the execution time of the algorithm is important in the problem. Calculations with an error of 300% are bad calculations.
PS: the performance of modern personal computers is ~ 10^11 commands / sec