A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5305410 can be evenly divided by 1 2 3 5 6 9 10 11 15 18 22 23 30 33 45 46 55 66 69 90 99 110 115 138 165 198 207 230 233 253 330 345 414 466 495 506 690 699 759 990 1,035 1,165 1,265 1,398 1,518 2,070 2,097 2,277 2,330 2,530 2,563 3,495 3,795 4,194 4,554 5,126 5,359 6,990 7,590 7,689 10,485 10,718 11,385 12,815 15,378 16,077 20,970 22,770 23,067 25,630 26,795 32,154 38,445 46,134 48,231 53,590 58,949 76,890 80,385 96,462 115,335 117,898 160,770 176,847 230,670 241,155 294,745 353,694 482,310 530,541 589,490 884,235 1,061,082 1,768,470 2,652,705 and 5,305,410, with no remainder.
Since 5,305,410 cannot be divided by just 1 and 5,305,410, it is not a prime number.