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There are many conjectures in the history of mathematics, but none of them are as confusing as the Riemann conjecture, or even a complete solution to the problem.

This is also the reason why Cheng Li felt a little desperate at this time.

He also had no idea how to solve the Riemann conjecture at this time.

Although before his crossing, there were people on Earth every year who claimed to have proved the Riemann hypothesis, but in the end they were all proven to be wrong, and their proof ideas naturally did not have much reference value.

The Riemann conjecture is so difficult to prove, but at the same time its status is so important, that is the most important thing.

Because it was too difficult to prove Riemann's conjecture, Riemann finally chose to abandon the proof after proposing this conjecture at the beginning. Instead, using the assumption that Riemann's conjecture was correct as a starting point, Riemann began to study its implications.

Then Riemann discovered a number of valuable and meaningful findings.

As a result, in the following 100 years, many research results were deduced based on the truth of the Riemann conjecture, and many in-depth and important mathematical and physical results could be proved under the premise that the Riemann conjecture was established.

Therefore, the Riemann conjecture cannot be thoroughly proved in one day, and many mathematicians, and even physicists, will feel very unsure.

This makes the Riemann conjecture the most anticipated mathematical conjecture by mathematicians, and is regarded as the number one problem in the field of mathematics.

It is said that Hilbert was asked an interesting question in his old age: "What would you do if you were resurrected a year or two after you died?" and he replied, "I would first ask if the Riemann hypothesis had been solved?"

The American mathematician Montgomery once said that if the devil promised mathematicians to exchange their souls for a proof of a mathematical proposition, most scientists would want to exchange it for the proof of the Riemann conjecture.

This fully illustrates the incomparable charm and importance of the Riemann conjecture.

There is no doubt that this is incomparable to a conjecture like Goldbach's conjecture, which is not widely used.

Of course, conjectures such as Goldbach's conjecture and Fermat's theorem, although they themselves seemed to be relatively niche in the field of mathematics at the time, and even such conjectures as Goldbach's conjecture were relatively niche in the field of mathematics, and their practical value was not too high.

However, in order to prove these conjectures, which do not seem to have much practical value, mathematicians have come up with various tools and even developed new branches of mathematics to prove them.

So, these conjectures may not seem to have much practical value in themselves, but in the process of proving them, they greatly accelerate the development of mathematics.

For example, in the process of proving Fermat's theorem, whether it is an incomplete or a final complete proof, it has a great impact on the mathematical community. Many mathematical results and even branches of mathematics were born in this process, including elliptic curves and modular forms in algebraic geometry, as well as Galois theory and Heck's algebra.

The same is true of the Goldbach conjecture, which also promoted the development of number theory in order to prove the Goldbach conjecture and has been applied in various fields such as games, engineering, and economics.

Therefore, although Goldbach's conjecture itself is not of much practical use, whether it is proved or not, it is more to satisfy the mathematician's desire to be more "true", but its status in the history of mathematics is still very high.

Moreover, it is the attitude of mathematicians who love the "real" that makes mathematics the most credible tool for human beings to explore the "real" world.

Like Goldbach's conjecture, although it is obvious to one person to use their own experience and common sense to think that any even number greater than 2 is the sum of two prime numbers.

Even, people can use computers to figure out even numbers in the range of a few hundred digits.

But as long as it is not mathematically rigorously proven, one cannot be sure that this theorem is "true".

In fact, there have been several conjectures in the history of mathematics that were numerically true when displayed at very high values, but were ultimately proven to be false.

It is precisely because human experience and common sense are not reliable that the "true" is extremely true in mathematics, which is an important foundation to support the development of mathematics.

Moreover, although Goldbach's conjecture does not seem useful at this stage, no one dares to say whether it will become the basis of an important theory in a few hundred years.

In fact, many mathematical theories seem to be useless when they are proposed, and it will take decades or even hundreds of years for people to discover their important value.

Therefore, conjectures such as Goldbach's conjecture, which seem to be useless at this stage, should not deny its value.

However, at this stage, there is no doubt that mathematical conjectures such as the Riemann conjecture, which has a wide application basis and involves many mathematical fields, even physics, have become some kind of basic existence, and its importance is much stronger, and it is more special than other mathematical conjectures.

Therefore, before entering the 3000th floor, Cheng Li never thought that the problem of the 3000th layer would be a conjecture with low practicality like Goldbach's conjecture.

But I have already guessed that the problem of the 3000th layer is the Riemann conjecture.

However, although it was expected, Cheng Li did not start solving the problem immediately this time as before, but sat down directly in place and began to meditate.

However, after a while, he still had no clue, and couldn't help scratching his hair a little frantically, making his hair as fast as a chicken nest.

And at this time, Xiao Shutong appeared in front of Cheng Li very abruptly.

He looked at Cheng Li and laughed, "What's wrong?

Cheng Li smiled bitterly: "Sort of, this question is too difficult......"

At this time, Xiao Shutong grinned and said, "How about it? Do you want me to give you some motivation?"

"Motivation?" Cheng Li was a little puzzled.

And Xiao Shutong directly answered Cheng Li with the next practical actions.

I saw that he stretched out his hand and waved lightly, and a huge light curtain appeared on the wall of this floor.

"You have now come to the 3000th floor, although you haven't answered the question yet, I can also allow you to use a little bit of the arithmetic tablet function, such as this way you can see the outside world where the Yin and Yang Secret Realm is located in real time, and the current situation of Qingling Island. ”

The picture presented in front of Cheng Li at this time is the real-time situation on Qingling Island!

Even, Xiao Shutong was next to the light curtain, and called up another light curtain, playing other pictures.

"This is a fast-forward replay of what happened on Qingling Island in the past three hours. ”

Cheng Li was a little dumbfounded and looked at the battles that were taking place on Qingling Island now, as well as the bloody and tragic scenes that had happened in the past 3 hours.

Moreover, Xiao Shutong also deliberately edited the light curtain into more than a dozen pictures, reproducing the whole process of the battlefield on Qingling Island in the past 3 hours from all corners.

After seeing the people of Qingling Island who were slaughtered by the Xuanjin faction one by one, in addition to the cultivators, there were also many mortals, and there were many old and weak women and children who were powerless, but they were all killed by the cultivators of the Xuanzhen faction like killing chickens and slaughtering dogs.

He saw the tragic picture of the old man of the Xuan Array Sect Transforming God, and with a light grip, he pinched and exploded hundreds of thousands of mortals.

He also saw the tragedy of the Great Elder and the others when they took the Infant Pill.

I also saw the monstrous hatred when Tuomu Zhenren fell into the devil.

I also saw the blood and backbone of the people of Qingling Island who were stimulated at the last moment!

After seeing these pictures, Cheng Li went from being stunned at the beginning, to his face pale, to tears, to extreme anger, and finally all these emotions turned into silent silence, which was restrained by Cheng Li.

Then, Cheng Li stood up expressionlessly, all his anger was hidden in his eyes, like a volcano, containing infinite power.

"Give me 10 minutes, and I'll prove this damn Riemann conjecture!"