Yes, prime numbers (prime numbers) have only one factor, so if there are two prime numbers, the division by short division formula can only be 1, but they are prime numbers. The following is the prime number table of 1~ 1000, which can be used in learning. They are mutually qualitative. 2 3 5 7 1 1 13 17 19 23 29 3 1 37 4 1 43 47

53 59 6 1 67 7 1 73 79 83 89 97 10 1 103 107 109 1 13

127 13 1 137 139 149 15 1 157 163 167 173 179 / kloc-0/8 1 19 1 193 197

199 2 1 1 223 227 229 233 239 24 1 25 1 257 263 269 27 1 277 28 1

283 293 307 3 1 1 3 13 3 17 33 1 337 347 349 353 359 367 373 379

383 389 397 40 1 409 4 19 42 1 43 1 433 439 443 449 457 46 1 463

467 479 487 49 1 499 503 509 52 1 523 54 1 547 557 563 569 57 1

577 587 593 599 60 1 607 6 13 6 17 6 19 63 1 64 1 643 647 653 659

66 1 673 677 683 69 1 70 1 709 7 19 727 733 739 743 75 1 757 76 1

769 773 787 797 809 8 1 1 82 1 823 827 829 839 853 857 859 863

877 88 1 883 887 907 9 1 1 9 19 929 937 94 1 947 953 967 97 1 977

983 99 1 997