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freeCodeCamp/curriculum/challenges/chinese/10-coding-interview-prep/project-euler/problem-123-prime-square-remainders.md

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---
id: 5900f3e71000cf542c50fefa
title: 问题123素数正方形余数
challengeType: 5
videoUrl: ''
dashedName: problem-123-prime-square-remainders
---
# --description--
令pn为第n个素数2,3,5,7,11 ......并且当rpn-1n +pn + 1n除以pn2时令r为余数。例如当n = 3时p3 = 5并且43 + 63 =280≡5mod 25.余数首先超过109的n的最小值是7037.求出余数首次超过的n的最小值1010。
# --hints--
`euler123()`应该返回21035。
```js
assert.strictEqual(euler123(), 21035);
```
# --seed--
## --seed-contents--
```js
function euler123() {
return true;
}
euler123();
```
# --solutions--
```js
// solution required
```