freeCodeCamp/curriculum/challenges/german/10-coding-interview-prep/project-euler/problem-160-factorial-trailing-digits.md

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
5900f40d1000cf542c50ff1f	Problem 160: Factorial trailing digits	1	301794	problem-160-factorial-trailing-digits

--description--

For any N, let f(N) be the last five digits before the trailing zeroes in N!.

For example,

$$\begin{align} & 9! = 362880 \; \text{so} \; f(9) = 36288 \\ & 10! = 3628800 \; \text{so} \; f(10) = 36288 \\ & 20! = 2432902008176640000 \; \text{so} \; f(20) = 17664 \end{align}$$

Find f(1,000,000,000,000)

--hints--

factorialTrailingDigits() should return 16576.

assert.strictEqual(factorialTrailingDigits(), 16576);

--seed--

--seed-contents--

function factorialTrailingDigits() {

  return true;
}

factorialTrailingDigits();

--solutions--

// solution required