Prime number : Prime number In mathematics, a prime number (or a prime) is a natural number which has exactly two distinct natural number divisors: 1 and itself. An infinitude of prime numbers exists, as demonstrated by Euclid around 300 BC. The first twenty-five prime numbers are:
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97
Composite number : Composite number A composite number is a positive integer which has a positive divisor other than one or itself. In other words, if 0 < n is an integer and there are integers 1 < a, b < n such that n = a × b then n is composite. By definition, every integer greater than one is either a prime number or a composite number. The The first 88 composite numbers (sequence A002808 in OEIS) are
4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64,
Natural number : Natural number In mathematics, a natural number (also called counting number) can mean either an element of the set {1, 2, 3, ...} (the positive integers) or an element of the set {0, 1, 2, 3, ...} (the non-negative integers). The latter is especially preferred in mathematical logic, set theory, and computer science.
Rational number : Rational number In mathematics, a rational number is a number which can be expressed as a quotient of two integers. Non-integer rational numbers (commonly called fractions) are usually written as a/b the vulgar fraction , where b is not zero. a is called the numerator, and b the denominator.
NUMBERS : NUMBERS Natural NumbersNatural Numbers