22afc2a0ca
Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com> Co-authored-by: Kristofer Koishigawa <scissorsneedfoodtoo@gmail.com> Co-authored-by: Beau Carnes <beaucarnes@gmail.com>
64 lines
886 B
Markdown
64 lines
886 B
Markdown
---
|
|
id: 5900f40d1000cf542c50ff1f
|
|
challengeType: 5
|
|
isHidden: false
|
|
title: 'Problem 160: Factorial trailing digits'
|
|
forumTopicId: 301794
|
|
---
|
|
|
|
## Description
|
|
<section id='description'>
|
|
For any N, let f(N) be the last five digits before the trailing zeroes in N!.
|
|
For example,
|
|
9! = 362880 so f(9)=36288
|
|
10! = 3628800 so f(10)=36288
|
|
20! = 2432902008176640000 so f(20)=17664
|
|
Find f(1,000,000,000,000)
|
|
</section>
|
|
|
|
## Instructions
|
|
<section id='instructions'>
|
|
|
|
</section>
|
|
|
|
## Tests
|
|
<section id='tests'>
|
|
|
|
```yml
|
|
tests:
|
|
- text: <code>euler160()</code> should return 16576.
|
|
testString: assert.strictEqual(euler160(), 16576);
|
|
|
|
```
|
|
|
|
</section>
|
|
|
|
## Challenge Seed
|
|
<section id='challengeSeed'>
|
|
|
|
<div id='js-seed'>
|
|
|
|
```js
|
|
function euler160() {
|
|
// Good luck!
|
|
return true;
|
|
}
|
|
|
|
euler160();
|
|
```
|
|
|
|
</div>
|
|
|
|
|
|
|
|
</section>
|
|
|
|
## Solution
|
|
<section id='solution'>
|
|
|
|
```js
|
|
// solution required
|
|
```
|
|
|
|
</section>
|