A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3063060 can be evenly divided by 1 2 3 4 5 6 7 9 10 11 12 13 14 15 17 18 20 21 22 26 28 30 33 34 35 36 39 42 44 45 51 52 55 60 63 65 66 68 70 77 78 84 85 90 91 99 102 105 110 117 119 126 130 132 140 143 153 154 156 165 170 180 182 187 195 198 204 210 220 221 231 234 238 252 255 260 273 286 306 308 315 330 340 357 364 374 385 390 396 420 429 442 455 462 468 476 495 510 546 561 572 585 595 612 630 660 663 693 714 715 748 765 770 780 819 858 884 910 924 935 990 1,001 1,020 1,071 1,092 1,105 1,122 1,155 1,170 1,190 1,260 1,287 1,309 1,326 1,365 1,386 1,428 1,430 1,530 1,540 1,547 1,638 1,683 1,716 1,785 1,820 1,870 1,980 1,989 2,002 2,142 2,145 2,210 2,244 2,310 2,340 2,380 2,431 2,574 2,618 2,652 2,730 2,772 2,805 2,860 3,003 3,060 3,094 3,276 3,315 3,366 3,465 3,570 3,740 3,927 3,978 4,004 4,095 4,284 4,290 4,420 4,620 4,641 4,862 5,005 5,148 5,236 5,355 5,460 5,610 6,006 6,188 6,435 6,545 6,630 6,732 6,930 7,140 7,293 7,735 7,854 7,956 8,190 8,415 8,580 9,009 9,282 9,724 9,945 10,010 10,710 11,220 11,781 12,012 12,155 12,870 13,090 13,260 13,860 13,923 14,586 15,015 15,470 15,708 16,380 16,830 17,017 18,018 18,564 19,635 19,890 20,020 21,420 21,879 23,205 23,562 24,310 25,740 26,180 27,846 29,172 30,030 30,940 33,660 34,034 36,036 36,465 39,270 39,780 43,758 45,045 46,410 47,124 48,620 51,051 55,692 58,905 60,060 68,068 69,615 72,930 78,540 85,085 87,516 90,090 92,820 102,102 109,395 117,810 139,230 145,860 153,153 170,170 180,180 204,204 218,790 235,620 255,255 278,460 306,306 340,340 437,580 510,510 612,612 765,765 1,021,020 1,531,530 and 3,063,060, with no remainder.
Since 3,063,060 cannot be divided by just 1 and 3,063,060, it is not a prime number.