diff --git a/Algorithms.py b/Algorithms.py
index 00a8733..8c110c0 100644
--- a/Algorithms.py
+++ b/Algorithms.py
@@ -97,6 +97,17 @@ def getNumPrimes(numberOfPrimes: int) -> list:
 	#Return the list with all the prime numbers
 	return primes
 
+#This function determines whether a number is prime
+def isPrime(possiblePrime: int) -> bool:
+	if(possiblePrime <= 3):
+		return possiblePrime > 1
+	elif(((possiblePrime % 2) == 0) or ((possiblePrime % 3) == 0)):
+		return False
+	for cnt in range(5, int(math.sqrt(possiblePrime)) + 1, 6):
+		if(((possiblePrime % cnt) == 0) or ((possiblePrime % (cnt + 2)) == 0)):
+			return False
+	return True
+
 #This is a function that returns all the factors of goalNumber
 def getFactors(goalNumber: int) -> list:
 	prime_factors_list = []
diff --git a/TestAlgorithms.py b/TestAlgorithms.py
index 7f037e2..6ce7ad0 100644
--- a/TestAlgorithms.py
+++ b/TestAlgorithms.py
@@ -42,6 +42,29 @@ class TestAlgorithms(unittest.TestCase):
 		answer = Algorithms.getNumPrimes(numPrimes)	#Get the answer from the function
 		self.assertEqual(correctAnswer, answer, "getNumPrimes failed the first test")
 
+	#This function tests the isPrime function
+	def testIsPrime(self):
+		#Test 1
+		num = 2
+		correctAnswer = True
+		answer = Algorithms.isPrime(num)
+		self.assertEqual(correctAnswer, answer, "isPrime failed the first test")
+		#Test 2
+		num = 97
+		correctAnswer = True
+		answer = Algorithms.isPrime(num)
+		self.assertEqual(correctAnswer, answer, "isPrime failed the second test")
+		#Test 3
+		num = 1000
+		correctAnswer = False
+		answer = Algorithms.isPrime(num)
+		self.assertEqual(correctAnswer, answer, "isPrime failed the third test")
+		#Test 4
+		num = 1
+		correctAnswer = False
+		answer = Algorithms.isPrime(num)
+		self.assertEqual(correctAnswer, answer, "isPrime failed the fourth test")
+
 	#This function tests the getFactors function
 	def testGetFactors(self):
 		#Test 1
@@ -203,9 +226,9 @@ if __name__ == "__main__":
 	unittest.main()
 
 """Results:
-............
+.............
 ----------------------------------------------------------------------
-Ran 12 tests in 0.002s
+Ran 13 tests in 0.002s
 
 OK
 """