The bright large floor-to-ceiling windows, the early morning sunlight sprinkled in the living room, the bright home, is very warm.

At home, it's still comfortable.

Han Sen, who got up early, prepared a simple morning for Qin Jing, and also prepared a very hearty lunch, Qin Jing could simply warm it up in the hospital at noon.

Qin Jing, who got up, hugged Han Sen from behind, during this period of time Han Sen was working at home, Qin Jing felt very happy, the house was cleaned up by Han Sen, there was not only breakfast every day, but also a hearty lunch, which was perfect, and said to Xiao Qin Jingli that life was very happy.

Qin Jing lay on Han Sen's back and said coquettishly: "Husband, is it good for me to raise you." ”

Han Sen smiled and said, "Then you have to come on, your pitiful salary is not enough for our monthly property expenses." ”

"Nasty."

A new day began in the greasy feeling of the little couple.

.......

Walking into the study, Han Sen nestled into a chair, his desk was already thick with scratch paper, and Han Sen was studying Goldbach's conjecture for the entire "retreat" time.

It's still great to be a big cow, you don't have to go to work to punch in, there is a salary every month, Han Sen recently found out that there are several units that pay him a salary, a salary from the domestic Academy of Social Sciences, a salary from the Chinese Academy of Sciences, an allowance from the State Council, a salary from the PBC School of Finance of Tsinghua University, a salary from the Department of Mathematics, a salary from Peking University, a salary from Shandong University, and a salary from Shanghai University of Finance and Economics.

There are also salaries from Stanford University, Massachusetts Institute of Technology, Princeton University, Cambridge University, Oxford University, University of Munich, ETH Zurich, and École Normale Supérieure in Paris.

Every month, Han Sen receives nearly one million wages.

The key is that so many units in China have given him "seven insurances and one housing fund", and Han Sen's provident fund account has tens of thousands of dollars in the account every month, even if all the enterprises go bankrupt in the future, the pension will be enough for Han Sen to spend.

Of course, Han Sen's biggest monthly income still comes from the rent collection of fifteen Xintai buildings, and yes, the buildings in Han Sen's hands have reached fifteen.

In addition, even though Han Sen only has 4% of the equity of Xintai Crypto in his hands, Han Sen can get a lot of dividends from Xintai Crypto every month.

As for Xintai Technology Manufacturing, although the revenue of Xintai Technology Manufacturing in the expansion period is amazing every financial month, Xintai Technology Manufacturing, which is in the expansion period, has never been red.

For Han Sen, he can spend money lavishly, and he can donate money everywhere generously, because the wealth in his hands does not make him put in too much effort, and the money comes easily, so it is not very heartbroken, but there is too much money in his hand Han Sen will feel very uneasy.

In the long run, he is expected to have a large enough "salary stream" that is stable enough, which also brings him a strong sense of security about expected income.

......

After sitting in the study for a while, Han Sen began to organize his scratch paper, and last night he completed the last calculation, and Han Sen completed the "Goldbach Conjecture Proof", that is, any even number greater than 2 can be written as the sum of two prime numbers.

In his 1742 letter to Euler, Goldbach proposed the following conjecture: any integer greater than 2 can be written as the sum of three prime numbers. But Goldbach himself could not prove it, so he wrote to the famous mathematician Euler to help prove it, but until his death, Euler could not prove it.

In 1966, Chen Jingrun proved that "1+2" was true, that is, "any sufficiently large even number can be expressed as the sum of two prime numbers, or the sum of one prime number and one and a half prime numbers".

From Goldbach's conjecture about even numbers, it can be deduced that any odd number greater than 7 can be written as the sum of three prime numbers. The latter is called the "weak Goldbach conjecture" or the "Goldbach conjecture about odd numbers". If the Goldbach conjecture about even numbers is correct, then the Goldbach conjecture about odd numbers will also be true. In May 2013, Harold Hoovgot, a researcher at the École Normale Supérieure in Paris, published two papers in which he announced that the "weak Goldbach conjecture" had been thoroughly proved.

And now, in the pile of scratch paper in front of Han Sen, what has been completed is the proof of Goldbach's conjecture.

What is the use of this conjecture?

We should not define the meaning of any theorem or conjecture, because this definition of meaning will limit its function, and no one can say which day or day a theorem will be applied in a field that the whole world does not expect, and then create a great invention that the whole world does not expect.

But for Han Sen, the most obvious effect of his completion of the proof of the "Goldbach conjecture" is that he has strengthened the complexity of the core encryption formula of "Xintai Encryption", and he can upgrade Xintai Encryption.

Hackers all over the world are challenging "Xintai encryption", but none of them have succeeded so far, and now Han Sen has once again strengthened the security of "Xintai encryption" through the "Goldbach conjecture", which is uncrackable.

.......

On the weekend, the weather was clear, Han Sen not only completed the proof of the "Goldbach Conjecture", but also completed the upgrade and maintenance of the core calculation formula of "Xintai Encryption", was in a good mood, prepared the ingredients, and asked a few people to do a barbecue party.

Zhang Bin with his fiancée Tang Wei;

Zhuang Wen took his little girlfriend he met at Peking University;

Qin Lan took a beautiful girl who didn't know where to look;

Kuang Tong with Yao Ruzhi;

Yao Ruzhi with Kuang Tong;

Qin Jing invited a few nice female colleagues from the hospital;

Everyone held a barbecue party in the courtyard of Han Sen's house and had a great time.

In the courtyard, Yao Ruzhi handed Han Sen the paper they had sorted out: "Teacher, we have completed the proof of twin primes. ”

Thick dissertation entitled: "Proof of the Twin Prime Conjecture"

Corresponding author: Han Sen

The first authors are Yao Ruzhi, Zhuang Wen, and Qin Lan.

Han Sen simply flipped through it and said, "Well, leave it for me to take a brief look, just send the Journal of Tsinghua University if there is no problem, since I am the corresponding author, then we will send it in Chinese, and we don't need to sort out English." ”

"Proof of Twin Prime Conjecture" is enough to influence the world's academics, such scholarship has a positive impact on the development of the whole world, and should be studied with the whole world in the English version. In Chinese, Yao Ruzhi always felt a little inappropriate, and asked in a low voice: "Teacher, is this good?" ”

Han Sen thought about it, indeed, these three young students need world-renowned academic achievements as a halo, although the Journal of Tsinghua University is rising, but there is still a big gap from the old "four major mathematics journals".

Han Sen walked into the study, took out his paper on the proof of the "Goldbach conjecture", and said: "This is the proof of the "Goldbach conjecture", sort it out, and publish it in the Journal of Tsinghua University.

Then the main part of the "Twin Prime Conjecture Proof" is completed by you, you will publish the "Annals of Mathematics", although I am the corresponding author, but I don't care, if you want to hold an academic conference, the three of you will go on it yourself, if you are made to cry, I will come out. ”

"Huh?"

Yao Ruzhi's "Huh? But it contains many layers of meaning: first, the paper in his hand turned out to be "Proof of the Goldbach Conjecture"?

Second, do we want to preside over the academic conference ourselves?