Math.Pow is not calculating correctly

Question

I\'m having a problem with C#. To be precise with the Math.pow(). If I try to calculate 15^14 then I get \"29192926025390624\". But if I calculate it with Wolfram Alpha I ge

Answer 1

C#'s Math.pow returns a Double, an IEEE 754 standard floating point number. It only has 15 significant digits:

http://msdn.microsoft.com/en-us/library/system.math.pow.aspx http://math.byu.edu/~schow/work/IEEEFloatingPoint.htm