void find_best_factorization(int *bx, int *by, uint nblocks){
    *bx = -1;
    int bytmp;

    for(bytmp = 1; bytmp != 65536; bytmp++){
        if(nblocks / bytmp < 65535){
            *by = bytmp;
            *bx = nblocks / bytmp;

            break;
        }
    }

    if(*bx == -1){
        printf("Unfactorizable?!\n");
        exit(-1);
    }
}