diff --git a/desafio-11/WhoisBsa/javascript/.valid b/desafio-11/WhoisBsa/javascript/.valid
new file mode 100644
index 000000000..584e186b0
--- /dev/null
+++ b/desafio-11/WhoisBsa/javascript/.valid
@@ -0,0 +1 @@
+141c8a1f3035efa05ebd1bee90e29a26c
diff --git a/desafio-11/WhoisBsa/javascript/index.ts b/desafio-11/WhoisBsa/javascript/index.ts
new file mode 100644
index 000000000..542e2b9f1
--- /dev/null
+++ b/desafio-11/WhoisBsa/javascript/index.ts
@@ -0,0 +1,70 @@
+// Primes in pi - WhoisBsa
+import fs from 'fs';
+
+const data = fs.readFileSync('./data.txt', 'utf8');
+const numbers = data.slice(2);
+const primeList = new Set<number>();
+
+let primeSequence = '';
+let maxSequence = '';
+let currentSequence = '';
+let currentNumber = '';
+let numberIndex = 0;
+
+const minPrime = 2;
+const maxPrime = 9973;
+const isPrimeNumber = (number: number) => {
+  if (number < 2 || (number % 2 == 0 && number > 2)) return false;
+
+  const s = Math.sqrt(number);
+  for (let i = 3; i <= s; i += 2)
+    if (number % i === 0) return false;
+
+  primeList.add(number);
+};
+
+isPrimeNumber(minPrime);
+for (var i = minPrime - 1; i <= maxPrime; i += 2)
+  isPrimeNumber(i);
+
+for (let i = 1; i < numbers.length; i++) {
+  if (primeSequence.length > numbers.length - i) break;
+
+  while (numberIndex < numbers.length)
+    getPrimeSequence(numberIndex, 5);
+
+  if (maxSequence.length > primeSequence.length)
+    primeSequence = maxSequence;
+
+  maxSequence = '';
+  numberIndex = i;
+}
+
+function getPrimeSequence(currentPosition: number, slice: number): void {
+  if (slice === 0) {
+    if (!currentSequence) {
+      numberIndex = numbers.length;
+      return;
+    }
+
+    return addToSequence();
+  }
+
+  currentNumber = numbers.slice(currentPosition, currentPosition + slice);
+
+  if (primeList.has(+currentNumber)) {
+    currentSequence = currentNumber;
+
+    if (currentNumber.length === 2)
+      return addToSequence();
+  }
+  getPrimeSequence(currentPosition, slice - 1);
+}
+
+function addToSequence(): void {
+  numberIndex += currentSequence.length;
+  maxSequence += currentSequence;
+  currentSequence = '';
+}
+
+console.log({ primeSequence });
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