A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2530110 can be evenly divided by 1 2 3 5 6 10 11 15 17 22 30 33 34 41 51 55 66 82 85 102 110 121 123 165 170 187 205 242 246 255 330 363 374 410 451 510 561 605 615 697 726 902 935 1,122 1,210 1,230 1,353 1,394 1,815 1,870 2,057 2,091 2,255 2,706 2,805 3,485 3,630 4,114 4,182 4,510 4,961 5,610 6,171 6,765 6,970 7,667 9,922 10,285 10,455 12,342 13,530 14,883 15,334 20,570 20,910 23,001 24,805 29,766 30,855 38,335 46,002 49,610 61,710 74,415 76,670 84,337 115,005 148,830 168,674 230,010 253,011 421,685 506,022 843,370 1,265,055 and 2,530,110, with no remainder.
Since 2,530,110 cannot be divided by just 1 and 2,530,110, it is not a prime number.