---
id: 5900f3ce1000cf542c50fee0
title: 'Problem 97: Large non-Mersenne prime'
challengeType: 5
forumTopicId: 302214
dashedName: 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 26972593−1; it contains exactly 2,098,960 digits. Subsequently other Mersenne primes, of the form 2p−1, 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.
# --hints--
`lrgNonMersennePrime()` should return a number.
```js
assert(typeof lrgNonMersennePrime() === 'number');
```
`lrgNonMersennePrime()` should return 8739992577.
```js
assert.strictEqual(lrgNonMersennePrime(), 8739992577);
```
# --seed--
## --seed-contents--
```js
function lrgNonMersennePrime() {
return true;
}
lrgNonMersennePrime();
```
# --solutions--
```js
// solution required
```