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freeCodeCamp/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-357-prime-generating-integers.english.md
Oliver Eyton-Williams bd68b70f3d Feat: hide blocks not challenges (#39504)
* fix: remove isHidden flag from frontmatter

* fix: add isUpcomingChange

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

* feat: hide blocks not challenges

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>
2020-09-03 15:07:40 -07:00

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---
id: 5900f4d11000cf542c50ffe4
challengeType: 5
title: 'Problem 357: Prime generating integers'
forumTopicId: 302017
---
## Description
<section id='description'>
Consider the divisors of 30: 1,2,3,5,6,10,15,30.
It can be seen that for every divisor d of 30, d+30/d is prime.
Find the sum of all positive integers n not exceeding 100 000 000such that
for every divisor d of n, d+n/d is prime.
</section>
## Instructions
<section id='instructions'>
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: <code>euler357()</code> should return 1739023853137.
testString: assert.strictEqual(euler357(), 1739023853137);
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
function euler357() {
// Good luck!
return true;
}
euler357();
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>