1966, Chen Jingrun published "Representing an even number as the sum of the products of a prime number and no more than two prime numbers" (referred to as "1+2"), which became a milestone in the study of Goldbach's conjecture.

1973, he published a detailed proof of "1+2" in China Science, and improved the numerical results published by 1966, which immediately caused a sensation in the international mathematics field and was recognized as a great contribution to Goldbach's conjecture research and a brilliant culmination of screening theory. His achievements are called "Chen Theorem" by international mathematicians, and have been written into many number theory books by six countries including the United States, Britain, France, the Soviet Union and Japan. This work also enabled him, Wang Yuan and Pan Chengdong to win the first prize of China Natural Science Award with 1978 * *.

Extended data:

Research history of Goldbach conjecture

Hua was the first mathematician in China who engaged in Goldbach conjecture. From 1936 to 1938, he went to England to study, studied number theory under Hardy, and began to study Goldbach conjecture, which almost verified all even conjectures.

From 65438 to 0950, after returning from the United States, Hua organized a seminar on number theory at the Institute of Mathematics of China Academy of Sciences, and chose Goldbach conjecture as the topic of discussion. Wang Yuan, Pan Chengdong, Chen Jingrun and other students who attended the seminar made good achievements in proving Goldbach's conjecture.

1956, Wang Yuan proved "3+4"; In the same year, the former Soviet Union mathematician A.D. Noguera Christopher proved "3+3".

1957, Wang Yuan proved "2+3" again.

1962, Pan Chengdong proved "1+5".

In 1963, Pan Chengdong, Barba En and Wang Yuan all proved "1+4".