5. Подчеркните простое число. [15 строк в таблице: 21, 32, 57, 18; 9, 12, 15, 29; 45, 53, 64, 100; 31, 48, 62, 96; 37, 64, 82, 104; 15, 18, 24, 23; 21, 44, 57, 83; 17, 24, 45, 56; 18, 42, 59, 74; 20, 42, 35, 97; 205, 236, 420, 513; 309, 325, 342, 359; 507, 524, 587, 591; 628, 631, 685, 600; 809, 810, 812, 813]