A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7237104 can be evenly divided by 1 2 3 4 6 7 8 12 14 16 17 21 24 28 34 42 48 49 51 56 68 84 98 102 112 119 136 147 168 181 196 204 238 272 294 336 357 362 392 408 476 543 588 714 724 784 816 833 952 1,086 1,176 1,267 1,428 1,448 1,666 1,904 2,172 2,352 2,499 2,534 2,856 2,896 3,077 3,332 3,801 4,344 4,998 5,068 5,712 6,154 6,664 7,602 8,688 8,869 9,231 9,996 10,136 12,308 13,328 15,204 17,738 18,462 19,992 20,272 21,539 24,616 26,607 30,408 35,476 36,924 39,984 43,078 49,232 53,214 60,816 64,617 70,952 73,848 86,156 106,428 129,234 141,904 147,696 150,773 172,312 212,856 258,468 301,546 344,624 425,712 452,319 516,936 603,092 904,638 1,033,872 1,206,184 1,809,276 2,412,368 3,618,552 and 7,237,104, with no remainder.
Since 7,237,104 cannot be divided by just 1 and 7,237,104, it is not a prime number.