Objective-C. Prime Numbers

This program generates a table of prime numbers:

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];


    int    p, d;
    BOOL isPrime;
    
    for (p = 2; p <= 50; ++p)
    {
        isPrime = YES;
        
        for (d = 2; d < p; ++d)
        {
            if (p % d == 0)
                isPrime = NO;
        }
            
        if (isPrime)
            NSLog(@"%i ", p);
    }
    
    [pool drain];
    return 0;
}