some C++ question

so /prog/rammers can you tell me why this only returns
x=1 y=1
I'm trying to have it return the values that equal 133745639

heres the code:

#include <cstdlib>
#include <iostream>

using namespace std;

int main(int argc, char* argv[])
{
unsigned long int x = 1;
unsigned long int y = 1;
unsigned long int z;


while ( z != 133745639)
{
z = x * y ;

if ( z = 133745639 )
{
cout << "x=" << x << "y=" << y << endl;
}
else
x++;
}
system("PAUSE");
return 0;

}

>>19
Textual operators considered Visual Basic and shit.
I like the arrow operator, except it's nearly impossible to type, not to mention character encoding issues. <- wouldn't work either, because then you'd have an ambiguity between x < -3 and x <- 3.

Also, := has the same damn problems as == with the additional issue that it's harder to type because the colon requires the use of the shift key on many layouts. (<- has the same issue with the shift key on US-like layouts, but at least that looks like something.)