A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8028012 can be evenly divided by 1 2 3 4 6 12 17 23 29 34 46 51 58 59 68 69 87 92 102 116 118 138 174 177 204 236 276 348 354 391 493 667 708 782 986 1,003 1,173 1,334 1,357 1,479 1,564 1,711 1,972 2,001 2,006 2,346 2,668 2,714 2,958 3,009 3,422 4,002 4,012 4,071 4,692 5,133 5,428 5,916 6,018 6,844 8,004 8,142 10,266 11,339 12,036 16,284 20,532 22,678 23,069 29,087 34,017 39,353 45,356 46,138 58,174 68,034 69,207 78,706 87,261 92,276 116,348 118,059 136,068 138,414 157,412 174,522 236,118 276,828 349,044 472,236 669,001 1,338,002 2,007,003 2,676,004 4,014,006 and 8,028,012, with no remainder.
Since 8,028,012 cannot be divided by just 1 and 8,028,012, it is not a prime number.