public void IsPrime()
 {
     Assert.IsTrue(NumericUtilities.IsPrime(2));
     Assert.IsTrue(NumericUtilities.IsPrime(31));
     Assert.IsTrue(NumericUtilities.IsPrime(17));
     Assert.IsFalse(NumericUtilities.IsPrime(4));
     Assert.IsFalse(NumericUtilities.IsPrime(1));
     Assert.IsFalse(NumericUtilities.IsPrime(55));
 }