In mathematics, the prime-counting function is the function counting the number of prime numbers less than or equal to some real number x. It is denoted by (this does not refer to the number π).
Read more about Prime-counting Function: History, Table of π(x), x / Ln x, and Li(x), Algorithms For Evaluating π(x), Other Prime-counting Functions, Formulas For Prime-counting Functions, Inequalities, The Riemann Hypothesis
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“The function of muscle is to pull and not to push, except in the case of the genitals and the tongue.”
—Leonardo Da Vinci (1425–1519)