--- id: 5900f5061000cf542c510017 challengeType: 5 title: 'Problem 409: Nim Extreme' videoUrl: '' localeTitle: '' --- ## Description undefined ## Instructions undefined ## Tests ```yml tests: - text: '' testString: 'assert.strictEqual(euler409(), 253223948, "euler409() should return 253223948.");' ``` ## Challenge Seed ```js function euler409() { // Good luck! return true; } euler409(); ``` ## Solution ```js // solution required ```
euler409()