rename directory

03_largest_prime_factor/main.go

@@ -0,0 +1,23 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("the largest prime factor of 600851475143 is", LargestPrimeFactor(600851475143))
+}
+
+func LargestPrimeFactor(n int) int {
+	divider := 2
+	for divider < n {
+		for n%divider == 0 {
+			n /= divider
+		}
+		divider++
+	}
+	if n > 1 {
+		return n
+	} else {
+		divider--
+		return divider
+	}
+}