chapter 8.3 Prime numbers
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P is a prime number if
-P is a counting number >1 -P has 1 and P as its only factors
Fundamental Theorem of Arithmetic
Every counting number > 1, can be written as multiplication of primes, and this can be done in "only one way". The unique way of writing down the product of prime is called prime factorization
Prime number
building block for all counting numbers in the sense of multiplication
odd number
number which is one more than twice of a whole number
even number
number which is twice of a whole number
zero
zero is an even number because it satisfies the definition