Reborn Technology Scholar

Chapter 44 Mersenne Primes

Qin Yuanqing ignored the dazed girl and went to the bookshelf to borrow a copy of "Fundamentals of Modern Analysis of Didone". Although it was only a basic book, there were still some things worth learning.

When Qin Yuanqing was reading a book introducing prime numbers, Mersenne prime numbers were mentioned in the book, and he immediately became interested.

When talking about Mersenne primes, we have to mention a great Chinese mathematician and his "Messenne Prime Distribution Law" published in 1992, which turned the Mersenne primes into a formula that can be expressed by mathematical symbols, that is

Internationally known as Zhou's conjecture.

Previously, although the English mathematician Shanks, the French mathematician Tolota, the German mathematician Burley Hart, the Indian mathematician Ramanuel Young and the American mathematician Gillis had all made speculations respectively.

, but their guesses have one thing in common, that is, they are all presented with approximate expressions, and the degree of closeness to the actual situation is unsatisfactory.

The accurate formula of Zhou's guess: when 2^(2^n)

Looks simple, right?

However, such a guess has not yet been proven or disproven, and has become a famous mathematical problem that has troubled the entire mathematical community for more than 20 years.

This year, Norwegian computer experts Oder & Strindmer discovered the 47th Mersenne prime number by participating in an international cooperation project called "Internet Mersenne Prime Search" (gimps), which is "2 to the power of 42643801 minus 2

1". It has 12837064 digits. If this huge number is written down continuously in ordinary font size, its length will exceed 50 kilometers, but it is not as large as the Mersenne prime number discovered in 2007.

As for why people spend so much energy and money studying Mersenne prime numbers, does it have any use?

It's actually of no use?

If I have to say it, the rsa algorithm counts. Every time I shop online, I have to thank the large prime numbers hidden in the password that cannot be disassembled. At the same time, large prime numbers are also used to test computer performance. For example, Intel uses gimps to test chips.

Bugs have also been discovered in programs and ke chips.

In addition, there is actually no point in worrying about whether mathematics is useful. Many times, the motivation of trend mathematicians is not necessarily how much economic benefit can be gained from solving a calculation, but because it is there.

Speaking more broadly, human beings cannot just live with what is in front of them, but also have poetry and a distant future.

As soon as Qin Yuanqing came into contact with Mersenne primes, he was very interested. He wrote down Zhou's guess on a piece of paper, and then began to look for relevant research results.

Qin Yuanqing's roommates didn't know that Qin Yuanqing was trying to prove Mason's quality and Zhou's guess. After all, they were all preparing for tomorrow's military training.

Sunscreen, thick socks...and the legendary military training artifact sanitary napkin!

Qin Yuanqing returned to the dormitory at eleven o'clock in the evening. The little fat man shyly took out a pack of sanitary napkins and gave it to Qin Yuanqing.

"Little fat man, you took the wrong medicine. I'm not a woman and I don't have my period. Why did you give me a sanitary napkin?" Qin Yuanqing said to the little fat man angrily.

Why is this little fat guy so wretched? A boy just goes to buy sanitary napkins and wants to give them to him. Doesn't this make him laugh?

The little fat man explained anxiously: "Boss, this is for padding your feet. I've checked with the seniors that padding your feet won't cause blisters."

Qin Yuanqing rolled his eyes and said angrily: "I am a child from the countryside. I just went through military training. I am not that delicate. I also have blisters on my feet."

Isn't it a big joke that Qin Yuanqing wouldn't use this thing even if he was beaten to death? Moreover, his physical condition does not require this thing.

Early the next morning, the freshmen all took off their jeans, put on green military uniforms, and accepted the military baptism.

"Everyone, stand at attention! News! Sit down!" The military training instructor began to assert his authority on the first day. From the moment he stood in the military posture, everyone was miserable and a few more naughty ones were punished.

Their three classes of boys were training together, and there were not many people, seventy or eighty, just one queue. I don’t know if the instructors did it on purpose, but there was a girls’ military training team near the two boys’ military training teams. Whenever the boys were

When the instructor scolds, the girl next door will laugh, which stimulates the boys' self-esteem to rise and they train with all their strength.

Standing in a military posture, turning left and right, walking in unison, walking in step... Under the military training of the instructors, the freshmen's discipline and posture became more and more like soldiers, and they also folded quilts, tofu cubes, and walked more and more every day.

It looks more and more like a military camp.

Of course, military songs are also indispensable, such as "Green Flowers in the Army" and "We Soldiers"... they are filled with songs on campus every day. Even when returning to class after military training, they walk neatly. Occasionally in the evening

There are social gatherings for new students, or instructors inspect dormitory hygiene and give grades.

Qin Yuanqing participated in military training during the day and went to the library at night. As for the boys turning into warm men and buying breakfast and water for the girls, I'm sorry, that doesn't belong to him.

On the fifth day of military training, the little fat man actually managed to seduce a girl from the finance department. When Qin Yuanqing found out, he had to give the little fat man a thumbs up, tough!

Military training, going to the library, Qin Yuanqing's life was boring and simple. Sometimes he even turned off his mobile phone while reading, and had to give various explanations if he didn't answer the call from the young lady.

As for the squad leader, he is not very competent and is basically left to the deputy squad leader and various class cadres.

On weekends, the intensity of military training weakened, and there was national defense education in the evening. The young lady returned to the capital and called him. Qin Yuanqing ran away after class, and he was destined not to stay in the dormitory at night.

Seeing that Jingtian was driving a beautiful-looking red sports car, Qin Yuanqing felt envious in his heart. Such a sports car would cost millions to start.

Can't afford it! Can't afford it!

After having a late-night snack together, when they returned to Jingtian's house, Qin Yuanqing picked up Jingtian anxiously, kicked the bedroom open, threw Jingtian onto the bed, and jumped on him.

I haven’t seen him for more than ten days. This is like trying to hold back the sight of a sow.

After one exercise and three rounds, he felt refreshed, hugging the beauty and chatting in a low voice. Qin Yuanqing talked about military training. For example, a girl fell in love with an instructor and was chasing the instructor. For example, an instructor wrote a love letter to a female counselor.

.

Jingtian was talking about things in the entertainment industry. For example, "The General of the Northern Wei Dynasty" in which she starred was broadcast on Zhejiang TV Station. As a result, the ratings were poor. From the plot of the TV series to the actors, it was criticized for being useless, except for the ending song "Fireworks Easily Cold."

》Except for good reviews, none of them have received good reviews.

"Haha, it's normal, it's normal, bad movies always come out with great songs!" Qin Yuanqing was quite proud.

"You, don't care. Your "Fireworks Easily Cold" has reached the number one spot, with more than double the number of downloads than the second place. When people contacted you, you didn't even reply. They even called me.

." Jingtian said angrily when he talked about this.

"The results are so good!?" Qin Yuanqing was a little surprised. He hadn't paid attention to Jingtian since he uploaded it to Kugou. After registration, he was either doing military training or going to the library. Who would pay attention to this?

"Does that mean I can get a lot of money?" Qin Yuanqing became excited when he thought of this. If the young lady hadn't been weak and limp now, Qin Yuanqing would have wanted to do it again.

"The account is your own, don't you know it yet!" Jingtian rolled his eyes, what a prodigal!

Qin Yuanqing took Jingtian's notebook from the bedside. It was a pink ultra-thin notebook. Jingtian entered the password to unlock it. Qin Yuanqing secretly complained that it was such a simple password. What settings were there? He remembered it at a glance.

Qin Yuanqing entered his account and found that the balance in the account had reached 15.2 million. In less than a month, "Fireworks Easily Cold" had brought him more than 14 million in income.

"So much money? Is it so easy to make money as a star?" Qin Yuanqing was dumbfounded. He could earn so much from one song. Wouldn't it be great to earn more than one song a year?

No wonder a certain top-notch man was able to open up his harem to select concubines!

"How is it possible? It's because your song is very popular. Many people download lossless sound quality and download ring tones, which is why I have such a high income. Last year, I only had 300,000, and I still had to pay taxes!" Jingtian said angrily,

How can you say that making money is easy?

She worked hard for a year, but the result was less than Qin Yuanqing's.

You must know that she is said to have the most potential in level 07. With such a mix, it is even more conceivable for others.

"Hey, I told you to register a studio before, but now I have to pay taxes...it hurts my body!" Jingtian said.

When Qin Yuanqing thought that he had to pay 40% personal income tax, he was immediately dumbfounded. When I went there, all he got before were bonuses, which were either tax-free or after-tax, and he did not need to pay tax. But now...

No wonder, celebrities evaded taxes one by one, and a certain Bing was taxed and fined more than 800 million! With such a high income tax, who wouldn’t want to avoid tax.

Qin Yuanqing immediately felt that it didn't smell good, and hurriedly held various discussions with the beauty, and finally decided to open Qingtian Entertainment, taking one word from each of their names. If there is anything in the future, it will be in the name of Qingtian Entertainment, and then there will be no need to pay.

Personal income tax is so high, but corporate income tax. As for value-added tax? This thing can be done with small profits or even losses, so how can it be possible to pay value-added tax?

As for daily expenses, they can also be reimbursed by the company, perfect!

Jingtian said sourly that he also wanted to sing, but unfortunately he didn't have any good songs.

Qin Yuanqing had just solved the tax avoidance problem and was in a good mood. When Jingtian said this, he directly took some pieces of paper and wrote down a few songs: "Wrong Wrong Wrong", "Perfume Is Poisonous", "The Wind Rises"!

These three songs don't require too advanced singing skills, so they are just right for Jingtian.

By the way, Qin, Yuan and Qing were all marked as composing the music, so the lyrics and music were all his.

Listening to Qin Yuanqing humming these three songs, the young lady was so happy that she jumped on the horse. At this moment, no matter how tired she was, she still had to grit her teeth and gallop forward, showing off her feminine style!

The worst thing is, I won’t get up all day tomorrow!

Qin Yuanqing held the young lady's buttocks and showed a look of enjoyment.