<section id="description">
<p>For every integer n>1, the family of functions fn,a,b  is defined</p>
<p>by fn,a,b(x)≡ax+b mod n for a,b,x integer and  0</p><p>F(N)=∑R(n) for 2≤n≤N.
F(107)≡638042271 (mod 1 000 000 007).</p>
<p>Find F(1014) (mod 1 000 000 007).</p>
</section>

function euler447() {
  // Good luck!
  return true;
}

euler447();


index

Задача 447: Ретракции C

Problem 447: Retractions C

<code>euler447()</code> should return 530553372.