Prime Number

NumberOfFactors.java → NumberSystem/NumberOfFactors.java

+package NumberSystem;
+
 public class NumberOfFactors {
     static int countFactors(int N) {
         double sqrt=(double) (Math.sqrt(N));

NumberSystem/PrimeNumbersBoolean.java

+package NumberSystem;
+
+public class PrimeNumbersBoolean {
+    static boolean isPrime(int n) {
+        for(int i=2;i<n;i++){
+            if(n%i==0)
+                return false;
+        }
+        return true;
+
+    }
+}