Tables | Factorials

The factorial of n (written n!) is the product of all integers from n down to and including 1, thus 4! = (4)(3)(2)(1) = 24. Factorials play a role in binomial probability calculations. They increase in size very rapidly, and this is one of the reasons why direct calculation of binomial probabilities is often unwieldy. We give here the first 25 factorials.

1!	1
2!	2
3!	6
4!	24
5!	120
6!	720
7!	5,040
8!	40,320
9!	362,880
10!	3,628,800
11!	39,916,800
12!	479,010,600
13!	6,227,020,800
14!	87,178,291,200
15!	1,307,674,368,000
16!	20,922,789,888,000
17!	355,687,428,096,000
18!	6,402,373,705,728,000
19!	121,645,100,408,832,000
20!	2,432,902,008,176,640,000
21!	51,090,942,171,709,440,000
22!	1,124,000,727,777,607,680,000
23!	25,852,016,738,884,976,640,000
24!	620,448,401,733,239,438,360,000
25!	15,511,210,043,330,985,959,000,000