Contents:– Number Systems from a General Point of View; The Number of Primes; How to Check If a Number Is Prime Using a Finite Definite Integral; The Ordinal Interpretation of the Integers and Its Use in Number Theory; The History of the Derivation of Euler’s Number; Corresponding Prime Number Distribution Equation; The Primes and Their Subsets as Continuum like the Integers; Three- and Four-Dimensional Generalized Pythagorean Numbers; A Probabilistic Approach of the Poincaré-Bendixon Problem in Rd; Some Classes of Bounded Sets in Quasi-Metric Spaces; On Perron’s Formula and the Prime Numbers; Uniform Convergence of Translation Operators