freeCodeCamp/curriculum/challenges/chinese/08-coding-interview-prep/project-euler/problem-381-prime-k-factori...

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id challengeType title videoUrl localeTitle
5900f4ea1000cf542c50fffc 5 Problem 381: (prime-k) factorial 问题381prime-k阶乘

Description

对于素数p令Sp=Σpkmodp1≤k≤5。

例如如果p = 77-1 +7-2 +7-3 +7-4 +7-5 = 6 + 5 + 4 + 3 + 2 = 720 + 120 + 24 + 6 + 2 = 872.当872 mod7= 4时S7= 4。

对于5≤p<100可以证实ΣSp= 480。

求ΣSp为5≤p<108。

Instructions

Tests

tests:
  - text: <code>euler381()</code>应该返回139602943319822。
    testString: 'assert.strictEqual(euler381(), 139602943319822, "<code>euler381()</code> should return 139602943319822.");'

Challenge Seed

function euler381() {
  // Good luck!
  return true;
}

euler381();

Solution

// solution required