A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7102056 can be evenly divided by 1 2 3 4 6 8 12 13 17 24 26 34 39 51 52 68 78 102 103 104 136 156 169 204 206 221 309 312 338 408 412 442 507 618 663 676 824 884 1,014 1,236 1,326 1,339 1,352 1,751 1,768 2,028 2,472 2,652 2,678 2,873 3,502 4,017 4,056 5,253 5,304 5,356 5,746 7,004 8,034 8,619 10,506 10,712 11,492 14,008 16,068 17,238 17,407 21,012 22,763 22,984 32,136 34,476 34,814 42,024 45,526 52,221 68,289 68,952 69,628 91,052 104,442 136,578 139,256 182,104 208,884 273,156 295,919 417,768 546,312 591,838 887,757 1,183,676 1,775,514 2,367,352 3,551,028 and 7,102,056, with no remainder.
Since 7,102,056 cannot be divided by just 1 and 7,102,056, it is not a prime number.