642 B
642 B
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
5900f52c1000cf542c51003e | Problem 447: Retractions C | 5 | 302119 | problem-447-retractions-c |
--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 0
F(N)=∑R(n) for 2≤n≤N. F(107)≡638042271 (mod 1 000 000 007).
Find F(1014) (mod 1 000 000 007).
--hints--
euler447()
should return 530553372.
assert.strictEqual(euler447(), 530553372);
--seed--
--seed-contents--
function euler447() {
return true;
}
euler447();
--solutions--
// solution required