Man and ghost, ghost and man, two life forms that are diametrically opposed but come from the same source. Ghosts come from people, and when people die, they will become ghosts, and ghosts will be reincarnated as people again.

A reincarnation.

To be more precise, any life has a soul, and the soul loses the body as a carrier and becomes a ghost.

There is a clear and invisible line between humans and ghosts that separates them from each other.

There is an old saying that people and ghosts have different paths.

The yang and the underworld coexist with each other and oppose each other.

Damn it!

Yin and Yang Eyes!

This should be the hidden skill of the hermit profession, and Otogawa is sure that he will definitely not be able to see the soul until he awakens.

Except, of course, the ghosts.

At the supermarket, I bought braised beef, chicken legs, bread, milk, and of course, instant noodles.

Laotan sauerkraut noodles, braised beef noodles, plus a bowl of dry noodles.

Spicy crayfish, sizzling squid, fresh braised beef, and roast pig's trotters, I drool when I think about it, and I can't even eat enough in the future, so how can I enjoy delicious food......

Three bowls of noodles, lined up in front of you, are honest, quite fragrant.

I opened the vacuum bagged braised beef and took a bite, but it was not as delicious as the braised food in the store, it was not strong enough, and the texture and taste were really unsatisfactory.

The chicken thighs are even more unpalatable, and the meat is scattered, that is, it can fill the stomach.

Barely filling his stomach, Xiao Yi took a bath, changed all the sheets, and lay on the bed and watched absorbing the 10 points of energy obtained by the ghost, and tomorrow he can finally open the skill "Settle In" to study the "Zhou's Conjecture".

"Well, why don't you come now? I can't sleep anyway......"

I really can't sleep, I was in a coma for more than ten hours during the day, and I slept enough.

Pen and paper are ready, and the draft of the previous research is placed in front of you.

Xiao Yi closed his eyes and calmed down, feeling that he had entered a state, and then turned on "Entering Concentration".

The basic content of Zhou's guess is very simple:

When 2^(2^n)

It seems simple, right?

Folk scientists do not bother to study this kind of conjecture of domestic scholars, and their eyes are fixed on problems such as Goldbach's conjecture, or to try to overturn the proven Fermat's theorem.

Zhou's conjecture?

Don't bother to pick up a pen!

For them, solving such a problem means that they can't get money, because there is no one to offer a reward, and they can't be famous, and even if the news is reported, it will not have a big reaction among the people.

Of course, the premise is that it can be proven.

This conjecture about Mersenne primes has not been proved or disproved since 1992, and has become a well-known mathematical problem, which has plagued the entire mathematical community for more than 20 years.

And it's that simple.

Regarding the distribution of Mersenne primes, the British mathematician Shanks, the French mathematician Torotta, the German mathematician Berlihardt, the Indian mathematician Ramanuyan, and the American mathematician Gilis have put forward their guesses, but their guesses have one thing in common, that is, they are all proposed in approximate expressions, and their proximity to the actual situation is unsatisfactory.

Only Zhou's guess is presented with precise expressions, and it is quite mathematically beautiful.

There are not many conjectures and theorems named after Chinese surnames in the world, and if Zhou's conjecture can be proven, there will be another place for Chinese in the temple of mathematics.

This is a great thing to win glory for the country and grow the face of the nation.

It's going down in history.

What is the use of proving Zhou's conjecture and promoting the progress of Mersenne prime number research?

It doesn't seem to be of much use.

The study of Mersenne primes began hundreds of years ago, before the invention of computers, pure manual calculations, Euler once proved that 2147483647 was a prime number by mental arithmetic when he was blind. This is the 8th Mersenne prime number that one has found, and it has a total of 10 digits.

This amount of computation......

Normal people feel confused!

(눈_눈)......

Of course, after the unremitting efforts of later generations, there is an accurate calculation formula in the search for prime numbers, and later the treasure hunt work is handed over to the computer, and now there is a supercomputer, but it is still not easy to find the Mersen prime.

The Mersenne primes found in the mathematical community are still in the two-digit range, and there are no more than 50.

As for what is the use of this Mersenne prime?

The RSA algorithm (asymmetric encryption algorithm) is counted as one, and every online shopping has to be thanks to the large prime number hidden in the password that cannot be disassembled. Checking computer performance is counted as one, and large prime numbers can be used to detect system vulnerabilities.

The meaning of mathematics is not measured in terms of money.

The meaning of these number mysteries, perhaps, is like what a mountaineer would say, because the mountains are there.

She is there, waiting for you to discover, to climb, to see the untouched but infinitely beautiful scenery on the peak.

Some mathematical theories that seem to be quite mysterious and esoteric now, may correspond to something in nature and have potential applications, but we don't know it yet.

Before Pythagoras discovered the mathematical relationship between string harmony and string length, tuners relied only on intuition and experience, and then Western music developed beautiful "chords" based on the twelve equal temperaments.

In the study of the "Riemannian prime conjecture", the mathematicians Hilbert and Polya matched the energy levels in the physical system.

People have known about the "π" of pi for a long time, but few people know that all rivers on Earth are roughly π times the distance in a straight line from their origin to their destination. The more rivers people count, the closer the average is to π.

Perhaps the appeal of mathematics and mathematical puzzles lies in the fact that they seem "useless" and are not limited by "usefulness".

Of course, the most intuitive embodiment of the role of mathematics on Xiao Yi is the accumulation of experience points, which is the external manifestation of the development of the brain.

Dawn came, and the sun shone down from the window and fell on Otogawa's back and shoulder, looking like it was gilded with a layer of gold and sparkling.

But he didn't notice it, and he was still obsessed with his own world.

When a person is doing something, devoting himself to it and forgetting everything around him, at that time, he exudes charm, and at that time, he is the most attractive person.

Unfortunately, no one appreciates it.

The pen in his hand is constantly writing, very smooth, making a "rustling" sound.

After nearly 4 hours of thinking, my mind was finally opened, and I figured out all the previous doubts and mistakes, and the problem of "Zhou's conjecture" was easily solved in my pen.

Gently put the pen down, Xiao Yi rubbed his temples, didn't prepare brown sugar water, and could only swallow a bag of bread with this milk.

Then he threw his heavy body into the big bed, and as soon as he closed his eyes, his voice rang out......