* and many math operations are defined on BigIntegers.
*
* The number is stored as a series of blocks in a
-* dynamically allocated array. It is as if the numbers
-* were written digit by digit in base 256 ^ sizeof(unsigned long).
+* dynamically allocated array. It is as if the number
+* were written digit by digit in base 2 ^ N, **where N is the
+* number of bits in an unsigned long.**
*
* This class is derived from BigUnsigned, which represents
* a large nonnegative integer. BigUnsigned should be studied