MantissaExponent
 Usage
• MantissaExponent[x] gives a list containing the mantissa and exponent of a number x.
• MantissaExponent[x, b] gives the base-b mantissa and exponent of x.
Notes
• Example: MantissaExponent[3.4 10^25]  . • The mantissa always lies between  and  or  and  . • MantissaExponent works with exact as well as approximate numeric quantities. • Example: MantissaExponent[Exp[Pi], 2] . • New in Version 2; modified in 4.
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