diff --git a/src/main/java/Calculations.java b/src/main/java/Calculations.java
index 09d1298..a97d163 100644
--- a/src/main/java/Calculations.java
+++ b/src/main/java/Calculations.java
@@ -16,4 +16,22 @@ public class Calculations {
         }
         return factorial;
     }
+
+    public static boolean isPrime(int num) {
+        if (num <= 1) {
+            return false; // Numbers less than or equal to 1 are not prime
+        }
+        if (num == 2 || num == 3) {
+            return true; // 2 and 3 are prime numbers
+        }
+        if (num % 2 == 0) {
+            return false; // Even numbers greater than 2 are not prime
+        }
+        for (int i = 3; i <= Math.sqrt(num); i += 2) {
+            if (num % i == 0) {
+                return false; // If num is divisible by any number from 3 to sqrt(num), it's not prime
+            }
+        }
+        return true; // If num is not divisible by any number from 2 to sqrt(num), it's prime
+    }
 }