public function testQuickModCheckForOdd()
 {
     $rnd = rand() % 32767 * 2 + 1;
     //  it has to be odd...
     $evenNumber = new \MyOddWeb\BigNumber($rnd);
     $this->assertFalse($evenNumber->IsEven());
     //  it has to be odd...
     $this->assertSame(1, $evenNumber->Mod(2)->ToInt());
 }