diff --git a/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-77-prime-summations.md b/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-77-prime-summations.md
index fade056d03..bd26cc3c69 100644
--- a/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-77-prime-summations.md
+++ b/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-77-prime-summations.md
@@ -15,23 +15,41 @@ It is possible to write ten as the sum of primes in exactly five different ways:
   5 + 5<br>
   5 + 3 + 2<br>
   3 + 3 + 2 + 2<br>
-  2 + 2 + 2 + 2 + 2<br>
+  2 + 2 + 2 + 2 + 2<br><br>
 </div>
 
-What is the first value which can be written as the sum of primes in over five thousand different ways?
+What is the first value which can be written as the sum of primes in over `n` ways?
 
 # --hints--
 
-`primeSummations()` should return a number.
+`primeSummations(5)` should return a number.
 
 ```js
-assert(typeof primeSummations() === 'number');
+assert(typeof primeSummations(5) === 'number');
 ```
 
-`primeSummations()` should return 71.
+`primeSummations(5)` should return `11`.
 
 ```js
-assert.strictEqual(primeSummations(), 71);
+assert.strictEqual(primeSummations(5), 11);
+```
+
+`primeSummations(100)` should return `31`.
+
+```js
+assert.strictEqual(primeSummations(100), 31);
+```
+
+`primeSummations(1000)` should return `53`.
+
+```js
+assert.strictEqual(primeSummations(1000), 53);
+```
+
+`primeSummations(5000)` should return `71`.
+
+```js
+assert.strictEqual(primeSummations(5000), 71);
 ```
 
 # --seed--
@@ -39,16 +57,54 @@ assert.strictEqual(primeSummations(), 71);
 ## --seed-contents--
 
 ```js
-function primeSummations() {
+function primeSummations(n) {
 
   return true;
 }
 
-primeSummations();
+primeSummations(5);
 ```
 
 # --solutions--
 
 ```js
-// solution required
+function primeSummations(n) {
+  function getSievePrimes(max) {
+    const primesMap = new Array(max).fill(true);
+    primesMap[0] = false;
+    primesMap[1] = false;
+    const primes = [];
+
+    for (let i = 2; i < max; i += 2) {
+      if (primesMap[i]) {
+        primes.push(i);
+        for (let j = i * i; j < max; j += i) {
+          primesMap[j] = false;
+        }
+      }
+      if (i === 2) {
+        i = 1;
+      }
+    }
+    return primes;
+  }
+
+  const MAX_NUMBER = 100;
+  const primes = getSievePrimes(MAX_NUMBER);
+
+  for (let curNumber = 2; curNumber < MAX_NUMBER; curNumber++) {
+    const combinations = new Array(curNumber + 1).fill(0);
+    combinations[0] = 1;
+    for (let i = 0; i < primes.length; i++) {
+      for (let j = primes[i]; j <= curNumber; j++) {
+        combinations[j] += combinations[j - primes[i]];
+      }
+    }
+    if (combinations[curNumber] > n) {
+      return curNumber;
+    }
+  }
+
+  return false;
+}
 ```