Reborn Tech Scholar

Chapter 44 Mersenne Primes
Chapter 44 Mersenne Primes

Qin Yuanqing ignored the girl who was in a daze, and borrowed a copy of "Basics of Didoney Modern Analysis" from the bookshelf. Although it was only a basic book, there were still some points worth learning.

When Qin Yuanqing was reading a book introducing prime numbers, it mentioned Mersenne prime numbers and became interested.

When it comes to Mersenne primes, I have to mention a great Chinese mathematician, and his publication "The Law of Mersenne Prime Distribution" in 92, making Mersenne primes a formula that can be expressed in mathematical symbols, that is, Internationally known as Zhou's guess.

Prior to this, although the English mathematician Shanks, the French mathematician Tolotta, the German German mathematician Berlehardt, the Indian mathematician Ramanujan and the American mathematician Gillis have all put forward speculations respectively. , but their guesses have one thing in common, that is, they are all presented in approximate expressions, and the degree of closeness to the actual situation is unsatisfactory.

而周氏猜测的准确公式：当2^（2^n）＜p＜2^（2^（n+1））时，Mp有2^（n+1）－1个是素数。

Seems easy, doesn't it?

However, such a conjecture, which has not been proved or disproved so far, has become a well-known mathematical problem, which has plagued the entire mathematical community for more than 20 years.

This year, Norwegian computer experts Oder & Strindmore discovered the 47th Mersenne prime, which is "2 to the power 42643801", by participating in an international collaborative project called "The Great Internet Mersenne Prime Search" (GIMPS). minus 1".It has 12837064 digits. If this huge number is written down continuously in ordinary font size, its length is more than 50 kilometers, but it is not as large as the Mersenne prime discovered in 07.

As for why people spend so much energy and cost studying Mersenne primes, is it any use?

It doesn't actually work?

If I insist, the RSA algorithm counts as one, and 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, the Intel test chip uses the GIMPS program, and the SKYLAKE chip has also found a bug.

Also, there is no point in wrestling with whether math is useful.Many times the motivation for trend mathematicians to act is not necessarily how much economic gain there is to solve an equation, but because it is there.

In a big way, human beings can't only have the troubles in front of them, but also have poetry and distance.

As soon as Qin Yuanqing came into contact with Mason prime numbers, he was very interested. He wrote Zhou's guess on the scratch paper, and then began to search for relevant research results.

Qin Yuanqing's roommates didn't know that Qin Yuanqing was trying to prove Mason's quality, 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 didn't return to the dormitory until eleven o'clock in the evening, and the little fat man shyly took out a pack of sanitary napkins to Qin Yuanqing.

"Little Fatty, you took the wrong medicine. I'm not a woman, and I don't have a period. What are you doing for me with sanitary napkins!" Qin Yuanqing said angrily to the little Fatty.

Why is this little fat man so wretched, a boy went to buy sanitary napkins and even gave them to him, isn't that making him laugh?

The little fat man explained anxiously: "Big brother, this is for a foot pad. I checked with the seniors, and this foot pad won't cause blisters."

Qin Yuanqing rolled his eyes, and said angrily, "I'm a child from the countryside, just for military training. I'm not that delicate, and I still have blisters on my feet."

Qin Yuanqing didn't even bother to kill him. Isn't this a big joke.And he doesn't need this stuff because of his physical fitness.

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

"Everyone has it, stand at attention! News! Sit down!" The military training instructor began to stand up on the first day, starting from standing in the military posture, everyone was miserable, and a few tricksters were made.

The boys from their three classes are training together, and there are not many people, seventy or eighty, just one queue.I don't know if the instructors did it on purpose. There is a female military training team near the two male military training teams. Whenever the boys are reprimanded by the instructors, the girls next door will laugh. Breastfeeding strength training.

Stand in a military posture, turn left and right back and forth, walk in unison, and walk straight. . . . . .Under the military training of the instructors, the discipline and stance of the freshmen became more and more like soldiers, and the daily folding of quilts and tofu blocks became more and more like a military camp.

Of course, there are also military songs, "Green Flowers in the Army" and "We Soldiers". . . . . .The campus is flooded every day, and even when he returns to the class after military training, he walks neatly.In the evening, there are occasional new students to meet up, or the instructors check the dormitory hygiene and score.

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, sorry, that doesn't belong to him.

It was just the fifth day of military training, and the little fat man actually hooked up a girl from the finance department. Qin Yuanqing knew that he had to give the little fat man a thumbs up, tough!

Military training, going to the library, Qin Yuanqing's life is boring and simple. Sometimes he even turns off his mobile phone when he is reading a book, and the young lady doesn't answer the phone, so he needs various explanations.

As for the squad leader, he was not very competent, and was basically handed over to the deputy squad leader and various squad cadres.

On weekends, the intensity of military training was weakened, and at night, it was national defense education. The young lady returned to the capital and called him. Qin Yuanqing slipped away after class, and was destined to live in the dormitory at night.

Seeing that Jingtian was driving a red sports car that looked very beautiful, Qin Yuanqing felt envious. Such a sports car must start.

can not afford!can not afford!
After eating supper together, they returned to Jingtian's house. Qin Yuanqing hurriedly picked up Jingtian, kicked open the bedroom, threw Jingtian directly on the bed, and threw himself on it.

I haven't seen each other for more than ten days. This is because people can't wait to see that the sows can go up.

Yijian and three consecutive, refreshed, holding the beauty and chatting in a low voice, Qin Yuanqing talked about military training, such as a girl who likes an instructor and is chasing the instructor.For example, an instructor writes a love letter to a female counselor.

Jingtian is talking about the entertainment industry. For example, the "General of the Northern Wei Dynasty" starring her was broadcast on Zhejiang TV, but the ratings were not good. From the plot of the TV series to the actors, she was criticized for nothing, except for the ending song "Fireworks Easy to Cold". "Except for the good reviews, none of them were well received.

"Haha, it's normal, normal, bad movies always comedy!" Qin Yuanqing was quite proud.

"You, don't care about it, your "Fireworks Are Cold" has reached the top, and the number of downloads has more than doubled that of No. .” When Jing Tian mentioned this, he said angrily.

"The grades are so good!?" Qin Yuanqing was a little surprised. Since Jingtian uploaded it to Kugou, he hadn't paid attention to it. After he registered, it was either 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 it wasn't for the young lady's weak body, Qin Yuanqing would have thought of doing it again.

"The account is your own, don't you know!" Jing Tian rolled his eyes, this 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. It was such a simple password.

Qin Yuanqing entered his account and found that the balance in the account had reached 1520 million. In less than a month, "Fireworks Are Cold" brought him more than 400 million in income.

"So much money? How easy is it to make money as a star?"

"How could it be that your song is so popular, many people download lossless sound quality, and download ringtones to get such a high income. Last year, I only had 30, and I still have to pay taxes!" Jingtian said angrily, It sounds like it's easy to make money.

She worked hard for a year, but Qin Yuanqing didn't get a fraction of the result.

You must know that she is known as the most potential 07-level person, and it is all mixed up like this, and others are even more imaginable.

"You, I told you to register a studio before, and keep going, but now it's time to pay taxes... it hurts!" Jing Tian said.

Qin Yuanqing was dumbfounded when he thought that he would pay 40% of the personal income tax. I went, all the bonuses he got before were all tax-free or after-tax, and he didn't need to pay tax.But now. . . . .

Qin Yuanqing immediately felt that it was not fragrant, and he hurriedly held the beauty for various discussions, and finally decided to open Qingtian Entertainment, and each took a word from the two names. So high personal income tax, but corporate income tax, as for the value-added tax?This thing can be accounted for to make a small profit or even a loss, how can it be possible to pay VAT.

As for ordinary expenses, it can also be reimbursed as a company, perfect!
Jingtian said sourly that he also wanted to sing, but unfortunately there were no good songs.

Qin Yuanqing has just solved the tax avoidance problem and is in a good mood.Hearing what Jingtian said, he took a few pieces of paper and wrote a few songs: "Wrong Wrong Wrong", "Perfume Is Poisonous", and "The Wind Rises"!
These three songs do not need too advanced singing skills, just suitable for Jingtian.

By the way, Qin Yuanqing marked the music, so the lyrics and music are all his.

Listening to Qin Yuanqing humming these three songs, the young lady was overjoyed.

(End of this chapter)