English

Noun

factorial ‎(plural factorials)

1. (mathematics, combinatorics) The result of multiplying a given number of consecutive integers from 1 to the given number. In equations, it is symbolized by an exclamation mark (!). For example, 5! = 1 × 2 × 3 × 4 × 5 = 120.

Usage notes

"n!" is read as "factorial of n" or "n factorial."

Related terms

• fact
• faction
• factor
• factory
• fashion

Translations

See also

• double factorial
• factorial prime
• falling factorial
• rising factorial

Adjective

factorial ‎(comparative more factorial, superlative most factorial)

1. (mathematics) Of or pertaining to a factor or factorial.
2. Of or pertaining to a factor.
3. (dated) Of or pertaining to a factory.

   (Can we find and add a quotation of Buchanan to this entry?)

Portuguese

Noun

factorial m (plural factoriais)

1. Alternative spelling of fatorial (superseded in Brazil by the 1943 spelling reform, and by the Orthographic Agreement of 1990 elsewhere. Still used in countries where the agreement hasn’t come into effect, and as an alternative spelling in Portugal, where the agreement came into effect in May 2009.)

Adjective

factorial m, f ‎(plural factoriais, comparable)

1. Alternative spelling of fatorial (superseded in Brazil by the 1943 spelling reform, and by the Orthographic Agreement of 1990 elsewhere. Still used in countries where the agreement hasn’t come into effect, and as an alternative spelling in Portugal, where the agreement came into effect in May 2009.)

Spanish

Noun

factorial m ‎(plural factoriales)

1. (mathematics) factorial