A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6088550 can be evenly divided by 1 2 5 10 13 17 19 25 26 29 34 38 50 58 65 85 95 130 145 170 190 221 247 290 323 325 377 425 442 475 493 494 551 646 650 725 754 850 950 986 1,102 1,105 1,235 1,450 1,615 1,885 2,210 2,465 2,470 2,755 3,230 3,770 4,199 4,930 5,510 5,525 6,175 6,409 7,163 8,075 8,398 9,367 9,425 11,050 12,325 12,350 12,818 13,775 14,326 16,150 18,734 18,850 20,995 24,650 27,550 32,045 35,815 41,990 46,835 64,090 71,630 93,670 104,975 121,771 160,225 179,075 209,950 234,175 243,542 320,450 358,150 468,350 608,855 1,217,710 3,044,275 and 6,088,550, with no remainder.
Since 6,088,550 cannot be divided by just 1 and 6,088,550, it is not a prime number.