Yeah, that part is wrong. It's a continuous function of x, so if its value at x=2 is 0.1400101..., it couldn't suddenly be 0 at every x < 2. Note to other comm

Yeah, that part is wrong. It's a continuous function of x, so if its value at x=2 is 0.1400101..., it couldn't suddenly be 0 at every x < 2. Note to other commenters: this has nothing to do with whether or not 1 is considered a prime, as the integral makes no reference to primes at all. OP was taking issue with the former claim in the quote, not the latter (and the latter, while true, appears to have nothing to say about the former; my guess is some kind of editing mistake).