Open an aircraft carrier to fight against Japan

Lin Yuan looked at the napkin and saw 24 numbers written on it, each of which was a seven-digit number. Holding it, Lin Yuan asked Hilbert, "What should I see from it?"

Hilbert smiled and said, "Just say what you see? Please don't tell me you saw a string of numbers."

Lin Yuan said: "These numbers are all odd numbers, I don't know if they are prime numbers..." Lin Yuan couldn't help thinking: "These are all seven-digit numbers, and they are all numbers in millions. Prime numbers, when will it be counted?"

Seeing Lin Yuan's embarrassment, Hilbert smiled gently, and said, "Your knowledge is good, but it's a pity that you don't have enough math talent. Sorry, I have to continue thinking about the problem." After Hilbert finished speaking, he returned to the In the state just now, holding a knife and fork in his hand, staring at the plate in a daze.

Lin Yuan thought to himself: "I don't understand it, but it doesn't mean that no one can understand it. I have one here. Although Zhang Yuanyi is engaged in physics research, in this era, physics and mathematics are not bad. Because physics is all about mathematics.” Lin Yuan thought of Zhang Yuanyi, so he started looking around, but he couldn’t find him after looking in the hall for a long time.

Lin Yuan was looking for it when he suddenly glanced at a dining table nearby, and saw that Wang Genbao was chatting with Zhang Yuanyi on the dining table, and the two chatted happily, very speculatively. It was Wang Genbao who was giving Zhang Yuanyi a lecture!

Lin Yuan thought to himself: "As a super genius, Zhang Yuanyi is actually listening to a chef's lecture. I don't know what Wang Genbao is telling him." Lin Yuan walked up to the two of them and asked, "What are you talking about? "

Zhang Yuan smiled and said to Lin Yuan: "I was listening to Lao Wang tell me about cooking, and I found that this is an area I have been neglecting. He just told me how to fry potato shreds, and I discovered that The knowledge inside is actually very deep. We regard the taste of shredded potatoes as an objective function, and the variables that control it include the amount of salt added, the temperature of the fire, the cooking time, etc. There are many variables in it. I want to establish these variables A mathematical model, and then make the best-tasting potato shreds..."

The two were talking when they heard Wang Genbao next to him say, "The numbers on this piece of cloth are so interesting!"

Lin Yuan was so surprised that he almost fell to the ground when he heard Wang Genbao's words, thinking: "He is a chef who only knows how to cook, how can he understand the puzzles created by the world's top mathematicians!"

Just as Lin Yuan was about to ask what is the mystery of the above numbers, he suddenly thought: Arabic numerals were not used in ancient China, and numbers in ancient China were represented by counting chips. China did not use Arabic numerals until the early [-]th century. This Wang Genbao was able to see Learn Arabic numerals!So Lin Yuan asked: "Can you understand the numbers above?"

Wang Genbao nodded and said, "Of course, I attended the literacy training class run by Lin Shuai in Fengtian, and that's where I learned."

Lin Yuan thought to himself: "It seems that our literacy work has made great progress!" Lin Yuan continued: "Then tell me, what is the mystery of these numbers?"

Wang Genbao said: "There are a few numbers here that can be subtracted to get 2." Then he pointed with his finger, and Lin Yuan suddenly realized, thinking: "Just thinking about how profound these numbers are, I didn't expect to put such a simple number. Things are forgotten."

As soon as Zhang Yuan heard Lin Yuan's words, he immediately moved his head towards him, glanced at the numbers on it casually, and exclaimed, "Oh, who wrote these numbers? The person who wrote these things is a master!"

Lin Yuan quickly asked, "What's wrong with these numbers?"

Zhang Yuanyi said: "These numbers are prime numbers, they are also called prime numbers, and they can also be called irreducible numbers."

Lin Yuan said in surprise: "These are seven-digit numbers, and you can tell they are prime numbers at a glance?"

Zhang Yuanyi asked Lin Yuan in surprise: "It's only seven digits, is it difficult to judge whether it is a prime number?"

Lin Yuan nodded helplessly, and said, "These numbers were written to me by Hilbert. He said that if I want to chat with him, I have to tell him the secrets in the numbers."

Zhang Yuanyi said helplessly: "It's so simple. Isn't what he wants to talk about is the twin prime number conjecture? Go and tell him."

Lin Yuan asked, "Twin prime numbers? What do you mean?"

Zhang Yuanyi said: "This is a famous mathematical conjecture. Hilbert mentioned it in his 23 questions. This is a mathematical conjecture as famous as Goldbach's conjecture. Its content is as follows. In Among the prime numbers we already know, there are many prime numbers with a difference of 2, such as 3 and 5, 7 and 9, etc. Do such numbers always exist? Prove it or disprove it.”

"This question has not been convincingly answered since it was raised. Later, people used computers to find such numbers. Now the largest number has more than [-] digits."

Lin Yuan said: "Well, let's use this guess, let's go, let's go together and get him to China."

Zhang Yuanyi said: "What did you say? Use this conjecture to get Hilbert to China?"

Lin Yuan said: "That's right, let's go. If you cooperate with me, you will definitely be able to get him to China. You go and chat with him, and I will translate for you. The key is to use your ability to conquer his heart."

Zhang Yuanyi smiled and said: "I understand, you are going to conquer him with science and technology that transcends the times, he will definitely be interested, and then he will go to our place, okay, no problem, and I don't need you Come and translate for us, we are all mathematicians, and communication between mathematicians does not require language."

Lin Yuan and Zhang Yuanyi found Hilbert. This time, there was an extra glass of beer in front of Hilbert. Hilbert was stirring in the glass with a fork in his hand, staring blankly at the vortex formed by the wine. Zhang Yuanyi walked in front of him, stretched out his hand and tore off the pen from his breast pocket.

Zhang Yuanyi's action obviously made Hilbert very unhappy. Hilbert looked at Lin Yuan and said, "What's the matter with your friend?"

Lin Yuan quickly apologized, but Hilbert couldn't care less about looking at him anymore. He was already attracted by Zhang Yuanyi's actions. Zhang Yuanyi took a napkin and wrote a word on it with a pen. A series of numbers, Hilbert was attracted by his series of numbers. Lin Yuan looked at those numbers and found that they were in groups of two, and they all had a difference of 2. He knew that he was also writing twin prime numbers, but soon found that That's not the case anymore, because some of the groups are even.

Zhang Yuanyi finished writing more than [-] groups of numbers, then drew circles on some of them, and pushed the napkin in front of Hilbert. Hilbert looked at the remaining groups of numbers. Draw a circle on it, wave to a waiter and say, "Bring me a stack of napkins."

The waiter beside him came over, but instead of handing over the napkin, he frowned and said, "Sir, you are not allowed to scribble on our napkin."

Hilbert said angrily: "Hurry up!"

But the waiter didn't show any subservience at all, he sternly said angrily, "No way!"