A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2963100 can be evenly divided by 1 2 3 4 5 6 7 10 12 14 15 17 20 21 25 28 30 34 35 42 50 51 60 68 70 75 83 84 85 100 102 105 119 140 150 166 170 175 204 210 238 249 255 300 332 340 350 357 415 420 425 476 498 510 525 581 595 700 714 830 850 996 1,020 1,050 1,162 1,190 1,245 1,275 1,411 1,428 1,660 1,700 1,743 1,785 2,075 2,100 2,324 2,380 2,490 2,550 2,822 2,905 2,975 3,486 3,570 4,150 4,233 4,980 5,100 5,644 5,810 5,950 6,225 6,972 7,055 7,140 8,300 8,466 8,715 8,925 9,877 11,620 11,900 12,450 14,110 14,525 16,932 17,430 17,850 19,754 21,165 24,900 28,220 29,050 29,631 34,860 35,275 35,700 39,508 42,330 43,575 49,385 58,100 59,262 70,550 84,660 87,150 98,770 105,825 118,524 141,100 148,155 174,300 197,540 211,650 246,925 296,310 423,300 493,850 592,620 740,775 987,700 1,481,550 and 2,963,100, with no remainder.
Since 2,963,100 cannot be divided by just 1 and 2,963,100, it is not a prime number.