freeCodeCamp/curriculum/challenges/english/08-coding-interview-prep/project-euler/problem-446-retractions-b.english.md

id	challengeType	title	forumTopicId
5900f52c1000cf542c51003d	5	Problem 446: Retractions B	302118

Description

For every integer n>1, the family of functions fn,a,b is defined by fn,a,b(x)≡ax+b mod n for a,b,x integer and 0F(N)=∑R(n4+4) for 1≤n≤N. F(1024)=77532377300600.

Find F(107) (mod 1 000 000 007)

Instructions

Tests

tests:
  - text: <code>euler446()</code> should return 907803852.
    testString: assert.strictEqual(euler446(), 907803852);

Challenge Seed

function euler446() {
  // Good luck!
  return true;
}

euler446();

Solution

// solution required