freeCodeCamp/curriculum/challenges/chinese/10-coding-interview-prep/project-euler/problem-234-semidivisible-n...

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---
id: 5900f4571000cf542c50ff69
challengeType: 5
videoUrl: ''
title: 问题234半透明数字
---
## Description
<section id="description">对于n≥4的整数我们定义n的下素数根用lpsn表示最大素数≤√n和n的上素数根upsn作为最小素数≥ √N。因此例如lps4= 2 = ups4lps1000= 31ups1000= 37.让我们称一个整数n≥4半可分如果lpsn和ups之一n除n但不是两者。 <p>不可超过15的半可分数之和为30数字为8,10和12. 15不是半可分的因为它是lps15= 3和ups15= 5的倍数。作为另一个例子最多1000个的92个半可见数字的总和是34825。 </p><p>所有半数均不超过999966663333的总和是多少 </p></section>
## Instructions
<section id="instructions">
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: <code>euler234()</code>应该返回1259187438574927000。
testString: assert.strictEqual(euler234(), 1259187438574927000);
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
function euler234() {
// Good luck!
return true;
}
euler234();
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
/section>