Factorials have been discovered in several ancient cultures, notably in Indian mathematics in the canonical works of Jain literature, and by Jewish mystics in the Talmudic book Sefer Yetzirah.

The factorial function (symbol: !) says to multiply all whole numbers from our chosen number down to 1. We usually say (for example) 4! as "4 factorial", but some people say "4 shriek" or "4 bang". Each …

Factorials are very simple things; they're just products, and are indicated by an exclamation mark. For instance, "four factorial" is written as 4! and means the product of the whole numbers between 1 and 4.

Oct 16, 2025 · Calculating factorials is a fundamental operation in mathematics, especially in combinatorics. The factorial of a non-negative integer n is denoted as n! and is defined as the …

Mar 7, 2025 · The factorial of a non-negative integer n, denoted by the symbol n! (read as ‘n factorial’), represents the product of all positive integers from 1 to n. n! = n × (n – 1) × (n – 2) × … × 3 × 2 × 1. …

May 14, 2025 · A factorial is multiplying a number by all whole numbers less than it down to one. Factorials are useful in math areas like combinatorics and probability calculus, where multiplying …

The first few numbers such that the sum of the factorials of their digits is equal to the prime counting function are 6500, 6501, 6510, 6511, 6521, 12066, 50372, ...