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freeCodeCamp/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-248-numbers-for-which-eulers-totient-function-equals-13.md
Oliver Eyton-Williams ee1e8abd87 feat(curriculum): restore seed + solution to Chinese (#40683)
* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
2021-01-12 19:31:00 -07:00

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---
id: 5900f4651000cf542c50ff77
title: 'Problem 248: Numbers for which Eulers totient function equals 13!'
challengeType: 5
forumTopicId: 301895
dashedName: problem-248-numbers-for-which-eulers-totient-function-equals-13
---
# --description--
The first number n for which φ(n)=13! is 6227180929.
Find the 150,000th such number.
# --hints--
`euler248()` should return 23507044290.
```js
assert.strictEqual(euler248(), 23507044290);
```
# --seed--
## --seed-contents--
```js
function euler248() {
return true;
}
euler248();
```
# --solutions--
```js
// solution required
```