How to find the Prime number of a complete number by java

Editor to share with you java how to complete the prime number, I hope you will learn something after reading this article, let's discuss it together!

If an n-digit is used exactly once for each number from 1 to n, we call it all-digital. For example, 2143 is a four-digit all-digit number, and it also happens to be a prime.

What is the largest prime number of all digits?

System.out.println (champernowneConstant ())

Analysis:

Calculate the numbers of each position separately, and then multiply them. BitInt indicates a number of digits, and total indicates that there are a total of several digits when I is executed. If total is exactly equal to num, the last bit of I is returned. If it is less than that, the loop continues, otherwise it means more, the excess distant is intercepted, and each extra bit I moves forward one bit (iUnix 10) until the distance distant is shortened to 0.

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