A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3026100 can be evenly divided by 1 2 3 4 5 6 7 10 11 12 14 15 20 21 22 25 28 30 33 35 42 44 50 55 60 66 70 75 77 84 100 105 110 131 132 140 150 154 165 175 210 220 231 262 275 300 308 330 350 385 393 420 462 524 525 550 655 660 700 770 786 825 917 924 1,050 1,100 1,155 1,310 1,441 1,540 1,572 1,650 1,834 1,925 1,965 2,100 2,310 2,620 2,751 2,882 3,275 3,300 3,668 3,850 3,930 4,323 4,585 4,620 5,502 5,764 5,775 6,550 7,205 7,700 7,860 8,646 9,170 9,825 10,087 11,004 11,550 13,100 13,755 14,410 17,292 18,340 19,650 20,174 21,615 22,925 23,100 27,510 28,820 30,261 36,025 39,300 40,348 43,230 45,850 50,435 55,020 60,522 68,775 72,050 86,460 91,700 100,870 108,075 121,044 137,550 144,100 151,305 201,740 216,150 252,175 275,100 302,610 432,300 504,350 605,220 756,525 1,008,700 1,513,050 and 3,026,100, with no remainder.
Since 3,026,100 cannot be divided by just 1 and 3,026,100, it is not a prime number.