A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3011424 can be evenly divided by 1 2 3 4 6 8 12 13 16 19 24 26 32 38 39 48 52 57 76 78 96 104 114 127 152 156 208 228 247 254 304 312 381 416 456 494 508 608 624 741 762 912 988 1,016 1,248 1,482 1,524 1,651 1,824 1,976 2,032 2,413 2,964 3,048 3,302 3,952 4,064 4,826 4,953 5,928 6,096 6,604 7,239 7,904 9,652 9,906 11,856 12,192 13,208 14,478 19,304 19,812 23,712 26,416 28,956 31,369 38,608 39,624 52,832 57,912 62,738 77,216 79,248 94,107 115,824 125,476 158,496 188,214 231,648 250,952 376,428 501,904 752,856 1,003,808 1,505,712 and 3,011,424, with no remainder.
Since 3,011,424 cannot be divided by just 1 and 3,011,424, it is not a prime number.