--- id: 5900f4651000cf542c50ff77 challengeType: 5 title: 'Problem 248: Numbers for which Euler’s totient function equals 13!' videoUrl: '' localeTitle: 问题248:Euler的totient函数等于13的数字! --- ## Description φ(n)= 13的第一个数字n!是6227180929.找到第150,000个这样的数字。 ## Instructions ## Tests ```yml tests: - text: euler248()应返回23507044290。 testString: 'assert.strictEqual(euler248(), 23507044290, "euler248() should return 23507044290.");' ``` ## Challenge Seed ```js function euler248() { // Good luck! return true; } euler248(); ``` ## Solution ```js // solution required ```
euler248()