Add is prime number

src/prime.py

+	"""Check wether a number is prime or not
+		Bruteforcing method
+	"""
+def isPrimeNumber(number):
+	if number == 1: 					# 1 is not prime
+		return False 
+	if number == 2:						# 2 is a prime number
+		return True
+	if number > 2 and number % 2 == 0:	# even numbers are not prime
+		return False
+
+	for i in range( 3, floor( sqrt(number) + 1 ), 2 ):
+		if number % i == 0: 
+			return False
+	return True
+
+