A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7300368 can be evenly divided by 1 2 3 4 6 8 9 12 16 18 24 27 36 43 48 54 72 81 86 108 129 131 144 162 172 216 258 262 324 344 387 393 432 516 524 648 688 774 786 1,032 1,048 1,161 1,179 1,296 1,548 1,572 2,064 2,096 2,322 2,358 3,096 3,144 3,483 3,537 4,644 4,716 5,633 6,192 6,288 6,966 7,074 9,288 9,432 10,611 11,266 13,932 14,148 16,899 18,576 18,864 21,222 22,532 27,864 28,296 33,798 42,444 45,064 50,697 55,728 56,592 67,596 84,888 90,128 101,394 135,192 152,091 169,776 202,788 270,384 304,182 405,576 456,273 608,364 811,152 912,546 1,216,728 1,825,092 2,433,456 3,650,184 and 7,300,368, with no remainder.
Since 7,300,368 cannot be divided by just 1 and 7,300,368, it is not a prime number.