A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7583004 can be evenly divided by 1 2 3 4 6 9 11 12 13 18 22 26 27 33 36 39 44 52 54 66 78 99 108 117 132 143 156 198 234 286 297 351 396 429 468 491 572 594 702 858 982 1,188 1,287 1,404 1,473 1,716 1,964 2,574 2,946 3,861 4,419 5,148 5,401 5,892 6,383 7,722 8,838 10,802 12,766 13,257 15,444 16,203 17,676 19,149 21,604 25,532 26,514 32,406 38,298 48,609 53,028 57,447 64,812 70,213 76,596 97,218 114,894 140,426 145,827 172,341 194,436 210,639 229,788 280,852 291,654 344,682 421,278 583,308 631,917 689,364 842,556 1,263,834 1,895,751 2,527,668 3,791,502 and 7,583,004, with no remainder.
Since 7,583,004 cannot be divided by just 1 and 7,583,004, it is not a prime number.