From black technology to super engineering

What are twin primes?

It refers to (3, 5) (5, 7) (11, 13) ... (857, 859) (881, 883) ... and so on. Two pairs of prime numbers with a difference of 2 are written out as (P, P+2).

In 1849, Alphonse de Polignac conjectured that for all natural numbers k, there are infinitely many pairs of primes (p, p + 2k). The case of k = 1 is the twin prime conjecture.

In the report of the International Congress of Mathematicians in 1900, the famous German mathematician David Hilbert formally proposed it in the eighth problem and made a canonical description.

There are infinitely many prime numbers p such that p + 2 is prime.

This is the twin prime conjecture.

Due to its high correlation with Goldbach's conjecture, countless mathematicians have continuously challenged it in the past hundred years, and the latest phased victory is that Zhang Yitang proposed a method with a finite interval, proving that "infinitely many prime number p, p+70 million". And then a group of great gods reduced 70 million to 246 according to his method.

Not to mention proving it, even if it is "found" out, it will take countless computing power.

GIMPS, which uses multiple computers for distributed network computing, is dedicated to this job. Although it is used to find Mersenne prime numbers, but there are only so many prime numbers, who is not looking for it?

This shows that finding prime numbers is not an easy task.

But Ita was able to use the time she said to "take a nap" to casually enumerate the next 532 pairs of the largest known twin prime numbers...

Ye Ming no longer has an intuitive understanding of this gap in computing power.

If I had to compare it, it would be her calculation speed, which is probably a few exponential "Nine Chapters" better than the current strongest supercomputer, "Fuyue" of the little devil.

...

"Human traditional computers use the disconnection and connection of circuits to represent 0 or 1, so as to realize the expression and calculation of binary numbers."

Ye Ming sat cross-legged on the bed, closed his eyes, and whispered in his mind.

At first glance, it looks like he is practicing some kind of magical skill.

Ita's voice came from his mind: "Are you reviewing circuit knowledge for me?"

"No, I'll teach you what a logic gate is next."

Following Ye Ming's answer, he also focused on "drawing" a standard AND gate structure in his mind.

"Can you see it?"

"Can."

Ita also repeated one.

"And gate, when the input terminals A and B are in the high state 1 at the same time, the value of its output terminal is 1, and it is 0 at other times."

"take note of it."

"You line up several different AND gates to get the answer."

"Underestimate me." Ita is like an unconvinced genius elementary school student, and immediately after replying, a long row of AND gates is formed in his mind: "10101011001"

"Convert to decimal."

"1369"

"Yeah." Ye Ming remained calm: "Continue, next is the NOT gate, the OR gate...the NAND gate..."

"Why are there so many doors?"

"Because... there's so much logic."

...

The door of the dormitory was pushed open silently, and Peng Xiaofei poked his head out. He saw Ye Ming sitting cross-legged on the bed, holding a book in his hand, frowning tightly, and muttering words...

He was startled at first, and then he walked up to Ye Ming lightly.

He was relieved when he saw the integrated circuit design on the cover of the book.

"Ye Ming!"

"What?"

"I thought you were practicing magical skills..." Peng Xiaofei picked up the book with a smile: "Is this something you will learn next semester? Are you planning to memorize it now?"

Ye Ming snatched back the book: "Let's get down to business."

"The real thing is that I just received a notice from the RC organizing committee this morning that this year, both domestic and international competitions...may have to be held online."

Ye Ming was stunned: "Fuck, how do you compare online?"

"It's said that it's a video." Peng Xiaofei was also full of displeasure: "There's no way, the reason for the epidemic. You said it's fine with Ah San, and even if we go, we're a little guilty. There's no need to be so serious in China..."

As soon as the epidemic was mentioned, Ye Ming knew that there was nothing to say. He frowned: "If you send a video, you can only see which team's R2 robot is faster, and there is no confrontation at all."

Peng Xiaofei nodded: "Yes, that's why I think, is this fucking purposely aimed at us..."

"...What did Teacher Chen say?"

"I called you to a meeting."

"Then go."

...

Ten minutes later, the two appeared in the preparation hall together.

After briefly explaining the situation, Mr. Chen looked at Ye Ming with a smile: "I have the same opinion as Peng Xiaofei. It is estimated that the organizing committee saw that our self-aiming and defense were too buggy, so we deliberately changed it to online."

Everyone laughed together.

Teacher Chen's words were of course a joke.

"However, since we have already decided to change to online, it means that we don't have to worry about aiming and defense, and we can just optimize the plan of building blocks. In fact, this is what I said before. What RC games value is The final mission is accomplished."

"If we regard the final completion of the building block tower as the task of the robot in reality, then throwing the ball and dodging the ball are just interferences with this task."

"Now, it's just that there are no distractions, allowing us to focus on our mission."

Listening to Teacher Chen's analysis, everyone nodded silently.

After Lao Chen served as the instructor, he did not bring much technical support to the team. After all, everyone had completed the final upgrade at that time. He provides more, or the concept of competition. Therefore, facing Wuhan University in the end, Ye Ming did not seek to defeat the opponent, but developed tactics around interfering with the opponent R2, and finally won the game.

I have to say that ginger is still old and spicy.

"Let's talk about it, we can start from several aspects." Teacher Chen smiled and looked at the crowd after finishing speaking.

Everyone was silent, and finally looked at Peng Xiaofei.

——Peng Xiaofei is the operator of the team, and the pressure is all on him.

And Peng Xiaofei "swiped" towards Ye Ming.

Looking at his friend's eyes asking for help, Ye Ming smiled and shook his head.

After thinking for a while, he said, "I think we might start with the process."

Teacher Chen immediately looked at him: "What do you say?"

"Look, everyone." Ye Ming said, turning his head and pointing to the building block tower built in the field: "Let's start with the distribution of the five building blocks after the tower is knocked down, and find an optimal angle and strength for hitting the tower—just Kind of like..."

Before Ye Ming finished speaking, Peng Xiaofei jumped up instantly.

"I know!"

Everyone looked at him again.

Ye Ming also raised his chin with a smile: "What do you know?"

"Billiard kick off!"

"Hey, smart!" Ye Ming applauded.

Everyone immediately laughed.

"Good, kick off." Mr. Chen nodded slightly, his eyes full of appreciation: "Create an optimal distribution that is conducive to the construction of R2, and then optimize the path of R2."

Li Dongsheng slapped his hands: "We can still learn from Wuhan University! We are too honest, picking up building blocks one by one. This time, we will pick up three at a time!"

Teacher Chen nodded after pondering for a while: "But that involves the modification of R2's mission manipulator, from design to perfection... Is there enough time?"

After hearing this, everyone looked at Ye Ming again.

Ye Ming narrowed his eyes, looked at the R2 robot, and thought of what Li Dongsheng said about picking up three at a time. After a while, he shrugged.

Of course I can.

It's nothing more than a forklift.

half a day's work.