[Dev-C++] Warning when compiling constant expression

[David M. <ci...@ya...>]

A line in my program reads

const unsigned long prime_product = 3 * 5 * 7 * 11 * 13 * 17 * 19 *
23 * 29;

When compiling in Linux (g++ 3.3.1) I get the warning 
factor.cpp:12: warning: integer overflow in expression

I figure it is using signed integers as temporary variables so I try.

const unsigned long prime_product = 3234846615; 
//3234846615 is the result of the above calculation.

Now I get this warning.
factor.cpp:12: warning: this decimal constant is unsigned only in ISO
C90

My code assumes a 32-bit system, which means an unsigned int is
capable of storing 2^32 (4,294,967,296) which is greater then the
number I am attempting to store in it? These are just warnings but I
still want to figure out why I am getting them.

Thanks in Advance
David McKen

__________________________________
Do you Yahoo!?
The New Yahoo! Shopping - with improved product search
http://shopping.yahoo.com