2018-10-10 18:03:03 -04:00
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---
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id: 5900f48f1000cf542c50ffa2
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2020-12-16 00:37:30 -07:00
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title: 问题291：Panaitopol素数
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2018-10-10 18:03:03 -04:00
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challengeType: 5
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videoUrl: ''
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---
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2020-12-16 00:37:30 -07:00
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# --description--
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2020-02-18 01:40:55 +09:00
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2020-12-16 00:37:30 -07:00
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如果对于某些正整数x和y，素数p称为Panaitopol素数。
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2020-02-18 01:40:55 +09:00
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找出多少个Panaitopol素数小于5×1015。
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2018-10-10 18:03:03 -04:00
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2020-12-16 00:37:30 -07:00
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# --hints--
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2018-10-10 18:03:03 -04:00
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2020-12-16 00:37:30 -07:00
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`euler291()`应该返回4037526。
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2018-10-10 18:03:03 -04:00
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```js
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2020-12-16 00:37:30 -07:00
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assert.strictEqual(euler291(), 4037526);
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2018-10-10 18:03:03 -04:00
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```
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2020-12-16 00:37:30 -07:00
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# --solutions--
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2020-08-13 17:24:35 +02:00
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