---
id: 5900f3ce1000cf542c50fee0
challengeType: 5
title: 'Problem 97: Large non-Mersenne prime'
---
## Description
The first known prime found to exceed one million digits was discovered in 1999, and is a Mersenne prime of the form 26972593ā1; it contains exactly 2,098,960 digits. Subsequently other Mersenne primes, of the form 2pā1, have been found which contain more digits.
However, in 2004 there was found a massive non-Mersenne prime which contains 2,357,207 digits: 28433Ć27830457+1.
Find the last ten digits of this prime number.
## Instructions
## Tests
```yml
tests:
- text: euler97() should return 8739992577.
testString: 'assert.strictEqual(euler97(), 8739992577, ''euler97() should return 8739992577.'');'
```
## Challenge Seed
```js
function euler97() {
// Good luck!
return true;
}
euler97();
```