56 lines
1.1 KiB
Markdown
56 lines
1.1 KiB
Markdown
---
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id: 5900f4ea1000cf542c50fffc
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challengeType: 5
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title: 'Problem 381: (prime-k) factorial'
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videoUrl: ''
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localeTitle: 问题381：（prime-k）阶乘
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---
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## Description
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<section id="description">对于素数p，令S（p）=（Σ（pk）！）mod（p）1≤k≤5。 <p>例如，如果p = 7，（7-1）！ +（7-2）！ +（7-3）！ +（7-4）！ +（7-5）！ = 6！ + 5！ + 4！ + 3！ + 2！ = 720 + 120 + 24 + 6 + 2 = 872.当872 mod（7）= 4时，S（7）= 4。 </p><p>对于5≤p<100，可以证实ΣS（p）= 480。 </p><p>求ΣS（p）为5≤p<108。 </p></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>euler381()</code>应该返回139602943319822。
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testString: 'assert.strictEqual(euler381(), 139602943319822, "<code>euler381()</code> should return 139602943319822.");'
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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 euler381() {
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// Good luck!
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return true;
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}
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euler381();
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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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