A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3022600 can be evenly divided by 1 2 4 5 7 8 10 14 17 20 25 28 34 35 40 50 56 68 70 85 100 119 127 136 140 170 175 200 238 254 280 340 350 425 476 508 595 635 680 700 850 889 952 1,016 1,190 1,270 1,400 1,700 1,778 2,159 2,380 2,540 2,975 3,175 3,400 3,556 4,318 4,445 4,760 5,080 5,950 6,350 7,112 8,636 8,890 10,795 11,900 12,700 15,113 17,272 17,780 21,590 22,225 23,800 25,400 30,226 35,560 43,180 44,450 53,975 60,452 75,565 86,360 88,900 107,950 120,904 151,130 177,800 215,900 302,260 377,825 431,800 604,520 755,650 1,511,300 and 3,022,600, with no remainder.
Since 3,022,600 cannot be divided by just 1 and 3,022,600, it is not a prime number.