From all-round academic master to chief scientist

After a while, several more people came in outside the door.

They are academician Yuan Ya, chairman of the Chinese Mathematical Society, as well as secretary-general Gong Zhou and deputy secretary-general Chen Fei.

The three of them were officially invited to participate on behalf of the Chinese mathematics community, while Lin Xiao and the others went in their personal capacity.

Academician Yuan Ya walked in and took a look. After confirming that everyone had arrived, he said: "Everyone is here, so there is no need to say more about the rest. We from the mainland have twenty-seven people this time. When the time comes, everyone will try their best." We stayed in a hotel together, and the conference provided a discounted rate, which was cheaper. Of course, in addition to the six professors who received invitations to give lectures, there was also a classmate Lin Xiao."

Having said this, Academician Yuan looked at Lin Xiao and smiled at him.

After Lin Xiao came back from Romania, Academician Yuan of course met and had a meal with the six mathematical geniuses who returned victoriously, and among them, Lin Xiao was naturally the one he paid the most attention to.

In any case, after Lin Xiao published an article in the "Annual Review of Mathematics" and received an invitation to report from the International Congress of Mathematicians, the only difference between him and them was age and qualifications.

Then Academician Yuan turned around and continued: "ICM provides all the rates for several reporters, so I won't say more. Then, our planned departure time is set to be a flight at two o'clock this afternoon. Everyone If you still have any questions, just ask them now.”

Naturally, there was no problem, and then they discussed other issues. After they were basically gone, they went back to get ready, packed their suitcases, and took the bus to the airport together.

It takes 30 hours to get from Beijing to Rio de Janeiro. After all, one is in Asia and the other is in South America, separated by the Pacific Ocean.

Therefore, these thirty hours were quite grueling.

Thirty hours later, we arrived in Rio de Janeiro. It was 9 a.m. in Brazil on July 29th.

After getting off the plane, there was a person in charge of reception at the airport who led them to the bus and went directly to the hotel.

After a long journey, everyone felt extremely tired, so they rested for a day. Anyway, the conference started on August 1, and there were still two days left.

…

The time came to the next day, July 30th.

As an invited speaker in the field of number theory, Lin Xiao received a notice from the organizer of the conference to hold a meeting of speakers in the field of number theory, so he came directly.

The conference will be held at the Rio Centro Convention and Exhibition Center, which will also be the venue for this mathematician conference.

The Mathematicians Conference is naturally a place where mathematicians gather. Although it has not started yet, the place is already busy. There are various reporters and media outside taking photos. In addition, there are a bunch of people gathered outside.

Some of them wanted to enter the exhibition hall, but to enter they needed to show their participation certificate or work permit to the staff. Lin Xiao and the others had already obtained it from the staff when they arrived, and he was wearing it around his neck at this time.

Looking at those people, Lin Xiao was a little curious about what they were here for.

So he came closer and listened.

"I proved Goldbach's conjecture! Let me in!"

"I proved the twin prime conjecture. Do you know what you are doing? You are stopping a master of mathematics!"

…

Lin Xiao was startled when he heard these sounds.

Where did all this come from... Boss?

Or to be more precise, should it be civil science?

Is there one that proves my guess, and another one that proves twin prime numbers?

I am afraid that none of the lectures at this International Congress of Mathematicians are so outrageous.

Probably only civilian scientists have this kind of... rich imagination, right?

When Lin Xiao was speechless, he couldn't help but admire the spirit of these people.

I was so persistent that I went straight to the International Congress of Mathematicians.

He looked around again, and there were some heavyweights nearby.

They even brought posters or blackboards over to show their results on the street.

The staff turned a blind eye to these people, probably because there were too many people and they were too lazy to take care of them.

Lin Xiao couldn't help but feel interested and wanted to see how these civil scientists dealt with the problem. He took a glance and found that there was a person not far away showing the Mersenne prime number judgment formula.

The problem he solved was the Mersenne prime number. At this time, I was curious about how this person did it. Moreover, someone who can study the Mersenne prime number judgment formula should not be very "civilian", right?

He thought for a while, since there was still half an hour before the meeting started, he might as well take a stroll.

So he walked over, stood in front of the blackboard and started reading.

Squatting next to the blackboard is a Brazilian, the owner of the blackboard.

When he saw Lin Xiao coming, and the sign he was wearing around his neck, indicating that he was here to attend a meeting, he immediately showed an enthusiastic expression on his face.

Those who participated in the meeting knew mathematics, so he stood up directly and said: "Hello, you also know the Mersenne prime numbers, right? Look at my judgment formula, I am sure that it is definitely better than the Lucas-Lehmer test. better!"

The Lucas-Lehmer test is the current method used to search for Mersenne primes and has been around for decades.

In the end, this person directly said it was better than this method?

Lin Xiao was noncommittal and took a brief look at it, only to find that there was only a short line on the blackboard.

"Let m be an integer, let the prime number a, c be greater than zero, c be greater than a, if (2^a-2)/(2^c-1)=m, then 2^c-1 is the Mersenne prime number."

Lin Xiao: "...So this must be a conjecture? You have no proof process."

"If you want to talk about a conjecture, then it should be. If it were based on my name, it should be called Ronal's conjecture!"

Hearing Lin Xiao's words, he was very excited, as if he had found a way to make his name famous throughout the ages.

But he soon added: "Of course, although it is a conjecture, we can now assume that it is true, and then through this method, we can also accurately find the Mersenne prime number."

As he spoke, he found a blackboard pen and started writing on the blackboard.

"Look, now we can set a equal to 7, c equal to 19, 7 and 19 are both prime numbers, and then substitute it into the formula. The numerator can be divided by the denominator, so when the exponent is 19, M19 is a Mersenne prime number."

"Let's give another example, such as a equals 3 and c equals 13. They are still true, and M13 is also a Mersenne prime number."

"Another example is a=5 and c=31, a=13 and c=61..."

“We can see that it’s all achievable!”

This Brazilian, probably named Ronald, listed seven sets of numbers, all of which came true.

At this moment, there were some people around who were attracted by the discussion here, and many people came. They were a little surprised when they saw Ronald's display.

It seems...there's something?

Is it really possible?

But at this moment, Lin Xiao observed the formula and suddenly said: "Try a equal to 29 and c equal to 67."

Hearing Lin Xiao's words, Ronald was stunned, then found a calculator from the side and started trying it.

As a result, everyone was silenced.

When the two values ​​mentioned by Lin Xiao are taken into account, the original formula can be divisible, but it cannot produce a Mersenne prime number!

People around him couldn't help but look at Lin Xiao in shock. How did he see it?

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