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id	title	challengeType	forumTopicId	dashedName
5900f45c1000cf542c50ff6e	Problem 239: Twenty-two Foolish Primes	5	301884	problem-239-twenty-two-foolish-primes

--description--

A set of disks numbered 1 through 100 are placed in a line in random order.

What is the probability that we have a partial derangement such that exactly 22 prime number discs are found away from their natural positions? (Any number of non-prime disks may also be found in or out of their natural positions.)

Give your answer rounded to 12 places behind the decimal point in the form 0.abcdefghijkl.

--hints--

euler239() should return 0.001887854841.

assert.strictEqual(euler239(), 0.001887854841);

--seed--

--seed-contents--

function euler239() {

  return true;
}

euler239();

--solutions--

// solution required

857 B Raw Blame History