The 25 prime numbers are arranged in descending order: 2, 3, 5, 7, 1 1 3, 17, 19, 23, 29, 3 1, 37,

4 1、43、47、53、59、6 1、67、7 1、73、79、83、89、97。

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Prime numbers have many unique properties:

1 and prime number p have only two divisors: 1 and p.

2. Basic theorem of elementary mathematics: Any natural number greater than 1 is either a prime number itself or can be decomposed into the product of several prime numbers, and this decomposition is unique.

The number of prime numbers is infinite.

4. The number formula π(n) of prime numbers is an irreducible function.

5, if n is a positive integer, in n? To (n+ 1)? There is at least one prime number between.

6, if n is a positive integer greater than or equal to 2, in n to n! There is at least one prime number between.

7. if the prime number p is the largest prime number not exceeding n(n≥4), then p > n/2.

8. Among all prime numbers greater than 10, the unit number is only 1, 3, 7, 9.