A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4311846 can be evenly divided by 1 2 3 6 7 9 11 14 17 18 21 22 27 33 34 42 51 54 61 63 66 77 99 102 119 122 126 153 154 183 187 189 198 231 238 297 306 357 366 374 378 427 459 462 549 561 594 671 693 714 854 918 1,037 1,071 1,098 1,122 1,281 1,309 1,342 1,386 1,647 1,683 2,013 2,074 2,079 2,142 2,562 2,618 3,111 3,213 3,294 3,366 3,843 3,927 4,026 4,158 4,697 5,049 6,039 6,222 6,426 7,259 7,686 7,854 9,333 9,394 10,098 11,407 11,529 11,781 12,078 14,091 14,518 18,117 18,666 21,777 22,814 23,058 23,562 27,999 28,182 34,221 35,343 36,234 42,273 43,554 55,998 65,331 68,442 70,686 79,849 84,546 102,663 126,819 130,662 159,698 195,993 205,326 239,547 253,638 307,989 391,986 479,094 615,978 718,641 1,437,282 2,155,923 and 4,311,846, with no remainder.
Since 4,311,846 cannot be divided by just 1 and 4,311,846, it is not a prime number.