A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5992512 can be evenly divided by 1 2 3 4 6 8 12 16 23 24 32 46 48 59 64 69 92 96 118 138 177 184 192 236 276 354 368 472 529 552 708 736 944 1,058 1,104 1,357 1,416 1,472 1,587 1,888 2,116 2,208 2,714 2,832 3,174 3,776 4,071 4,232 4,416 5,428 5,664 6,348 8,142 8,464 10,856 11,328 12,696 16,284 16,928 21,712 25,392 31,211 32,568 33,856 43,424 50,784 62,422 65,136 86,848 93,633 101,568 124,844 130,272 187,266 249,688 260,544 374,532 499,376 749,064 998,752 1,498,128 1,997,504 2,996,256 and 5,992,512, with no remainder.
Since 5,992,512 cannot be divided by just 1 and 5,992,512, it is not a prime number.