The top-notch movie queen wears books, disguises herself as a man and is handsome all over the world

All the way to the third floor of the office, Heliancheng knocked on the door of one of the offices, and an elderly voice came from inside, "Come in."

Heliancheng went in first, "Teacher."

Qin Yue and Qin Jingyu followed behind. There were many certificates and trophies hung on the wall of the office, which were the honors the old professor had received before. In addition to these, there were various documents piled everywhere.

Old Professor Jiang Qiqian was about to reach retirement age. His face was covered with wrinkles. He was wearing a pair of reading glasses. When he saw the three people coming in, his eyes fell on Qin Jingyu, who was the last one.

Without waiting for an introduction, the elderly man asked Qin Jingyu, "Are you the boy who borrowed the book?"

She was stunned for a moment, and then said respectfully: "Hello, Professor Jiang, I am Qin Jingyu."

Jiang Qiqian nodded, with a kind smile on his face, "I know you."

She was a little confused, but what was certain was that whether it was the original owner or she, it was today that she saw the old professor.

Seeing her confusion, Jiang Qiqian explained: "Jinyang told me about you, saying that you are good at mental arithmetic. You were the only student who solved the test question he asked in No. 7 Middle School."

He Liancheng said: "Teacher, that question from Professor Zhang was given to this kid?"

Jiang Qiqian nodded, then kept silent.

Heliancheng only felt shocked.

Some time ago, after Professor Zhang Jinyang returned to Dibei University, he was entrusted to go to No. 7 Middle School to persuade Pei Mo, the prince of the Pei Group. Pei Mo was very talented in physics. The school hoped to persuade Pei Mo to give up going abroad and study at Dibei University. Department of Physics.

Professor Zhang came back after going to No. 7 Middle School. He was very happy and said that he had met someone who surprised him. He was a young math genius in the first year of high school. He even specially asked a difficult question on their mid-term exam paper to test the young genius. Strength.

Unsurprisingly, when the test results came out later, it turned out that only one person could actually do it. After Professor Zhang learned about it, he was full of praise and asked his classmate, Teacher Chen Weifeng, to train him well and then send it to Dibei University. He would personally take care of it. this student.

Professor Zhang Jinyang is one of the most powerful mathematicians in China. He can praise his students personally and teach them personally, which makes people jealous and envious.

However, in order not to disturb the student about these things, Professor Zhang told them not to go to the student. However, the student himself did not know about it. He Liancheng and the others had only heard about such things, so they did not know what Professor Zhang was talking about. The name of a little math genius.

Therefore, when Jiang Qiqian heard that Qin Yue had a cousin who wanted to ask him to find books and sort them out, he thought of Qin Jingyu.

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He Liancheng looked at Qin Jingyu in surprise, "I didn't expect it was you."

Qin Yue was also shocked when he heard this. His cousin seemed to be very powerful.

Qin Jingyu was even more confused. What professor, someone deliberately gave her the last question of the midterm exam to solve?

Could it be that she had met some kind of sweeping monk before and she didn't know about it?

But no one seemed to want to tell her the truth, and they were hiding something.

Jiang Qiqian waved to her, "Come here."

As he spoke, he took out the documents and books that he had prepared long ago.

Qin Jingyu glanced at Qin Yue, who smiled and motioned for her to come forward.

Walking forward, Jiang Qiqian asked her to sit down, and she did so. At the same time, she asked in confusion: "Professor Jiang?"

She just came to borrow books, what was she doing?

Professor Jiang took out a piece of paper and it said, in the given sequence { a n }, a1=1, an+1=2an+1, find its general formula and the first n and Sn.

This was an extremely basic number sequence question. Qin Jingyu looked at Professor Jiang and didn't know what he meant, but the old man said kindly: "Young man, let me test you. You need me to lend you a pen to solve this question." ?"

She shook her head, "No need, just say Gongbi q=2, an=..."

The answer was stated in one breath, and there was no need to even calculate. I just glanced at the question and my mind automatically figured it out.

Jiang Qiqian nodded, wrote on the paper, and said, "Then let's continue. The answer is f ( n ) = 2 n ? 1 Arithmetic functions have such properties. If it is a Mersenne prime number, what about N?"

Qin Jingyu's eyes lit up and he replied, "It's a prime number."

"Yes, it must be a prime number." Jiang Qiqian smiled, and then wrote some more formulas, "Let's continue to speculate, if p = f (2 n ? 1) is a prime number."

"Then there must be f ( n ) Mersenne primes." Qin Jingyu followed the professor's pen and suddenly seemed to have an epiphany, "They are causally related no matter what, and no one can live without the other."

It's the same as the restrictive relationship she thought about before.

Jiang Qinian: "That's right,"

Qin Jingyu said happily: "In the end, 2^2n-1 is a Mersenne prime number and needs to be calculated separately. It is too troublesome, so we can use mathematical induction in reverse."

Jiang Qiqian's originally calm expression began to show shock, and he was very surprised that she could think of this level. He originally wanted to guide this young boy's problem-solving ideas step by step, and finally returned to the induction method.

But she didn't expect that she understood the secret of it and started to use the reverse induction method directly. It took the entire mathematical research team of Dibei several years to get to this point.

He suppressed the shock in his heart and had a vague premonition that this young man who had just turned seventeen might shock the entire mathematical world in the future!

"Professor, can you lend me your pen?" Qin Jingyu said to the shocked old professor.

Jiang Qiqian quickly came to his senses and said excitedly: "Of course, you continue."

Qin Jingyu took a pen and quickly wrote down rows of formulas on the paper. Soon one paper, two papers, and three papers were filled...

Qin Yue on the side couldn't understand and asked Heliancheng in a low voice, "What are the professor and Jingyu discussing?"

He Liancheng: "If I'm not wrong, it's Zhou's conjecture."

"Zhou's conjecture? It's not your graduate thesis topic, but the conjecture that the professor's entire team is trying to crack. My cousin?"

He is only a freshman in high school, how could this happen?

Qin Yue became more and more shocked as he spoke, and even his voice became louder involuntarily.

He Liancheng quickly covered his voice, "Shh, I'm just guessing, I don't know."

He was no less surprised than Qin Yue. He couldn't even understand what Professor Jiang wanted to do, and this Qin Jingyu was more powerful than he imagined. He could no longer be described as a genius, and was even a pervert.

At this time, the pen in Qin Jingyu's hand gradually stopped. She was stuck on one of the steps. It was because she had only scratched the surface of the conjecture recently, so she put down the pen.

Jiang Qiqian asked nervously: "Aren't you going to continue untying it?"

She shook her head, frowned and said, "Professor, I may need to study more."

Jiang Qiqian was a little disappointed, but at the same time he breathed a sigh of relief. If a young man were to break the conjecture that the entire mathematical community had not cracked for decades, wouldn't it be a slap in the face to the entire mathematical community?

I agree more and more with what Zhang Jinyang said. This boy is a mathematical genius that is rare in a century!

想了想，姜启谦在纸上写：“当2^2n＜p＜2^2n+1时…”

Qin Jingyu blurted out: "Then 2^(n+1)-1 of Mp are prime numbers."

When Jiang Qiqian heard this, he laughed instantly, "Little boy, you asked your cousin to find these documents and books. I guessed that you are really interested in Zhou's conjecture."

He Liancheng next to him heard this and thought to himself, it was indeed Zhou's guess! !