Prime number
idea · 1 work · 3 mentions · 10 anchored passages
prime · prime number · primes · A prime number · prime numbers
in the texts
Elements
A number measured only by the unit; the basic indivisible building block of the numeric system in Book VII, central to several propositions on primality.
Therefore any number either is prime or is measured by some prime number.
For, if B, A are not prime to one another, some number will measure them.
Therefore some prime number will be found which will measure the one before it, which will also measure A.