Abstract
The paper illustrates how the formal framework proposed earlier for complex numbers can be applied to integer and natural numbers, facilitating proofs by means of clusters’ registrations for Mizar adjectives. The contents of the article are closely related to the series of Mizar articles “Elementary Number Theory Problems” (with MML identifiers NUMBER*), but it is not solving any of “250 Problems in Elementary Number Theory” by Wacław Sierpiński book.