We're going to find out what X is today! The factorial calculator is a subset of a math(s) site for the smartest people who are interested in math(s). Math is singular by the way.
Anyway, I found this searching for something else naturally. What is 15 factorial? I.E. 15 x 14 x 13 x 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = ?
Would you believe 1,307,674,368,000! 1.3 trillion.
Here's a list of 1 to 30 factorial.
n n!
1 1
2 2
3 6
4 24
5 120
6 720
7 5040
8 40320
9 362880
10 3628800
11 39916800
12 479001600
13 6227020800
14 87178291200
15 1307674368000
16 20922789888000
17 355687428096000
18 6402373705728000
19 121645100408832000
20 2432902008176640000
21 51090942171709440000
22 1124000727777607680000
23 25852016738884976640000
24 620448401733239439360000
25 15511210043330985984000000
26 403291461126605635584000000
27 10888869450418352160768000000
28 304888344611713860501504000000
29 8841761993739701954543616000000
30 26525285981219105863630848000000
It's interesting the way the zeros start piling up at the end. 10,000! has 2499 zeros at the end.
So go to the site and factorize a number...
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13 comments:
I have no interest in the value of X. And here maths is plural and the short form of mathematics (also plural).
I love the concrete poetry of the sloping numbers. Other than that it's all Greek to me brother
You missed factorial zero, which is also one.
Even more interesting is factorial of a half, which is half the square root of PI.
"Dear Algebra, please stop asking us to find your X. She's never coming back and don't ask Y"
Sue - Don't you guys drive on the wrong side of the road too?
Cloudia - It's almost a smooth curve but not quite.
Stu - "half the square root of PI" No trailing zeros there!
River - The best use of X and Y there is.
You learn something new every day. I always thought "factorial" was a Baltimore baseball fan fascinated by baseball statistics. It certainly has nothing to do with "facts," which are an obsolete concept once used for understanding the world.
Me count good up to about 10.
My math classes were before the advent of the internet, and we had to find the factorals using our brain and a calculator.
Kathy G. How did you do factorials of fractions? Integration by parts ? I can only do them using calculus. Most of class failed. But that was 65 years ago.
Bill - Facts? We don't need no stinkin' facts!
Deb - You good counter.
Kathy - And lots of pencil lead.
Stu - I found this ... https://www.youtube.com/watch?v=JJ7gUNG12LU&t=114s
The zeroes pile up because (a) every multiple of 10 adds a zero and (b) 2×5 = 10, so every number ending in 5 following an even number -- which means every number ending in 5 -- you get another zero. Thus, through each cycle of 10 numbers -- 1 to 10, 11 to 20, 21 to 30, and so on -- you gain two zeroes.
Perhaps I can use this to help me sleep at night - you know, like counting sheep.
Lady - 1 through 5 over and over.
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