A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4348050 can be evenly divided by 1 2 3 5 6 7 10 14 15 21 25 30 35 41 42 50 70 75 82 101 105 123 150 175 202 205 210 246 287 303 350 410 505 525 574 606 615 707 861 1,010 1,025 1,050 1,230 1,414 1,435 1,515 1,722 2,050 2,121 2,525 2,870 3,030 3,075 3,535 4,141 4,242 4,305 5,050 6,150 7,070 7,175 7,575 8,282 8,610 10,605 12,423 14,350 15,150 17,675 20,705 21,210 21,525 24,846 28,987 35,350 41,410 43,050 53,025 57,974 62,115 86,961 103,525 106,050 124,230 144,935 173,922 207,050 289,870 310,575 434,805 621,150 724,675 869,610 1,449,350 2,174,025 and 4,348,050, with no remainder.
Since 4,348,050 cannot be divided by just 1 and 4,348,050, it is not a prime number.