max int size

im trying to find the largest memmory allocation for an unsigned int.
Ive tried unsigned long but it didnt get me any further.
so my question:
int = 4 bytes
double = 8 bytes
unsigned long = ?
what is the type of the theoretical largest number i can represent in C++
i know that in windows accessory calculator i can caluculate 2^144,000 so there must be some kind of work around.
tia,
Hoops

try lookin the includes section of your compiler for the limit.h file or possibly the help section of the compiler for the definition of MAXINT, MAXLONG. I believe the maximum number given type long is something like 19 digits.