diff --git a/Maths/TwinPrime.js b/Maths/TwinPrime.js
new file mode 100644
index 0000000000..871b1eab70
--- /dev/null
+++ b/Maths/TwinPrime.js
@@ -0,0 +1,29 @@
+import { PrimeCheck } from './PrimeCheck'
+
+/**
+ * @function twinPrime
+ * Gets the 'twin prime' of a prime number.
+ *
+ * @param {Integer} n The number to find the twin prime of.
+ * @returns {Integer} Either the twin, or -1 if n or n + 2 is not prime.
+ *
+ * @see https://en.wikipedia.org/wiki/Twin_prime
+ *
+ * @example twinPrime(5) = 7
+ * @example twinPrime(4) = -1
+*/
+function twinPrime (n) {
+ const prime = PrimeCheck(n)
+
+ if (!prime) {
+ return -1
+ }
+
+ if (!PrimeCheck(n + 2)) {
+ return -1
+ }
+
+ return n + 2
+}
+
+export { twinPrime }
diff --git a/Maths/test/TwinPrime.test.js b/Maths/test/TwinPrime.test.js
new file mode 100644
index 0000000000..c3e057e10e
--- /dev/null
+++ b/Maths/test/TwinPrime.test.js
@@ -0,0 +1,10 @@
+import { twinPrime } from '../TwinPrime.js'
+
+describe('Twin Primes', () => {
+ it('Should be valid twin primes', () => {
+ expect(twinPrime(3)).toBe(5)
+ expect(twinPrime(5)).toBe(7)
+ expect(twinPrime(4)).toBe(-1)
+ expect(twinPrime(17)).toBe(19)
+ })
+})
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