63 lines
855 B
Markdown
63 lines
855 B
Markdown
---
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id: 5900f40d1000cf542c50ff1f
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challengeType: 5
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title: 'Problem 160: Factorial trailing digits'
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forumTopicId: 301794
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---
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## Description
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<section id='description'>
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For any N, let f(N) be the last five digits before the trailing zeroes in N!.
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For example,
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9! = 362880 so f(9)=36288
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10! = 3628800 so f(10)=36288
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20! = 2432902008176640000 so f(20)=17664
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Find f(1,000,000,000,000)
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>euler160()</code> should return 16576.
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testString: assert.strictEqual(euler160(), 16576);
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function euler160() {
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return true;
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}
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euler160();
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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