1.4 KiB
1.4 KiB
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
5900f43c1000cf542c50ff4e | Problem 207: Integer partition equations | 5 | 301848 | problem-207-integer-partition-equations |
--description--
For some positive integers k
, there exists an integer partition of the form 4^t = 2^t + k
,
where 4^t
, 2^t
, and k
are all positive integers and t
is a real number.
The first two such partitions are 4^1 = 2^1 + 2
and 4^{1.584\\,962\\,5\ldots} = 2^{1.584\\,962\\,5\ldots} + 6
.
Partitions where t
is also an integer are called perfect. For any m ≥ 1
let P(m)
be the proportion of such partitions that are perfect with k ≤ m
.
Thus P(6) = \frac{1}{2}
.
In the following table are listed some values of P(m)
\begin{align}
& P(5) = \frac{1}{1} \\\\
& P(10) = \frac{1}{2} \\\\
& P(15) = \frac{2}{3} \\\\
& P(20) = \frac{1}{2} \\\\
& P(25) = \frac{1}{2} \\\\
& P(30) = \frac{2}{5} \\\\
& \ldots \\\\
& P(180) = \frac{1}{4} \\\\
& P(185) = \frac{3}{13}
\end{align}$$
Find the smallest $m$ for which $P(m) < \frac{1}{12\\,345}$
# --hints--
`integerPartitionEquations()` should return `44043947822`.
```js
assert.strictEqual(integerPartitionEquations(), 44043947822);
```
# --seed--
## --seed-contents--
```js
function integerPartitionEquations() {
return true;
}
integerPartitionEquations();
```
# --solutions--
```js
// solution required
```