diff --git a/src/main/java/com/mattrixwv/NumberAlgorithms.java b/src/main/java/com/mattrixwv/NumberAlgorithms.java
index 7a95562..91e253f 100644
--- a/src/main/java/com/mattrixwv/NumberAlgorithms.java
+++ b/src/main/java/com/mattrixwv/NumberAlgorithms.java
@@ -238,7 +238,7 @@ public class NumberAlgorithms{
 	}
 	public static List<Long> getFactors(long goalNumber) throws InvalidResult{
 		//You need to get all the primes that could be factors of this number so you can test them
-		Double topPossiblePrime = Math.ceil(Math.sqrt(goalNumber));
+		Double topPossiblePrime = Math.ceil(goalNumber / 2.0);
 		List<Long> primes = getPrimes(topPossiblePrime.longValue());
 		ArrayList<Long> factors = new ArrayList<>();
 
@@ -272,7 +272,7 @@ public class NumberAlgorithms{
 	}
 	public static List<BigInteger> getFactors(BigInteger goalNumber) throws InvalidResult{
 		//You need to get all the primes that could be factors of this number so you can test them
-		BigInteger topPossiblePrime = goalNumber.sqrt();
+		BigInteger topPossiblePrime = goalNumber.divide(BigInteger.TWO);
 		List<BigInteger> primes = getPrimes(topPossiblePrime);
 		ArrayList<BigInteger> factors = new ArrayList<>();
 
diff --git a/src/main/java/com/mattrixwv/exceptions/InvalidResult.java b/src/main/java/com/mattrixwv/exceptions/InvalidResult.java
index 2f57c90..3133a71 100644
--- a/src/main/java/com/mattrixwv/exceptions/InvalidResult.java
+++ b/src/main/java/com/mattrixwv/exceptions/InvalidResult.java
@@ -6,7 +6,7 @@
 package com.mattrixwv.exceptions;
 
 
-public class InvalidResult extends Exception{
+public class InvalidResult extends RuntimeException{
 	private static final long serialVersionUID = 1L;
 	public InvalidResult(){
 		super();