The author hold that we still have a lot of difficult problems to be solved in the field of prime num- bers,which is regarded as one of the branches of maths,such as the law of the distribution and the producing caus- es of the prime number.

• 素数是一个最古老的数学分支,几百年来仍有许多未解的难题:素数分布规律、孪生素数生成原因等。