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freeCodeCamp/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-97-large-non-mersenne-prime.english.md
Valeriy 79d9012432 fix(curriculum): quotes in tests (#18828)
* fix(curriculum): tests quotes

* fix(curriculum): fill seed-teardown

* fix(curriculum): fix tests and remove unneeded seed-teardown
2018-10-20 23:32:47 +05:30

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---
id: 5900f3ce1000cf542c50fee0
challengeType: 5
title: 'Problem 97: Large non-Mersenne prime'
---
## Description
<section id='description'>
The first known prime found to exceed one million digits was discovered in 1999, and is a Mersenne prime of the form 269725931; it contains exactly 2,098,960 digits. Subsequently other Mersenne primes, of the form 2p1, have been found which contain more digits.
However, in 2004 there was found a massive non-Mersenne prime which contains 2,357,207 digits: 28433×27830457+1.
Find the last ten digits of this prime number.
</section>
## Instructions
<section id='instructions'>
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: <code>euler97()</code> should return 8739992577.
testString: assert.strictEqual(euler97(), 8739992577, '<code>euler97()</code> should return 8739992577.');
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
function euler97() {
// Good luck!
return true;
}
euler97();
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>