求出2—1000之间的所有素数，要求以表格形式输出，每行输出5个素数，每一个占用10个字符宽度。-Find all prime numbers between 2-1000, will find the prime numbers were sent to a text file and binary file prime.dat prime.txt, the results to a text file, requiring the output in tabular form, each line of output 5 primes, each take up to 10 characters wide.