If you don’t fall down, mathematics education is still underway.

Gan Qi also started to write some textbooks, but Gan Qi's textbook content is extremely simple, and there is even only one formula and one example in many concepts.

This is why Gan Qi fully believes in the level of mental and spiritual development of these immortals. After practicing immortals for hundreds of years, he will never be inferior to the smart people among mortals.

Mathematics is actually logic. Anyone with strong logic abilities will only become stronger and stronger after hundreds of years of training.

Uh... As for the strong energy, it is impossible.

Gan Qi has given up on mathematics and has stopped paying attention to Qi Qiang in class. Just kill the chicken to scare the monkey once. You can't really scare Qi Qiang out of it.

But Gan Qi didn't expect that the student in the back of the country suddenly raised his hand and asked: "Senior brother, what is the prime number?"

Gan Qi suddenly thought that the energy was strong, and he was surprised. He replied: "Then let me talk about the concept of prime numbers in advance today. This is related to the best method of encryption and prohibition. The so-called prime numbers are natural numbers that cannot be divided by any other natural numbers other than one. The so-called natural numbers are..."

Qi Qiang hurriedly started writing, writing every word, without understanding one sentence, and not writing down one without missing one.

"What are the Riemann conjecture and the Goldbach conjecture?" Qi Qiang asked again.

"These two conjectures are also conjectures about prime numbers. The Goldbach conjecture is that any integer greater than five can be written as the sum of two prime numbers. The Riemann conjecture is difficult to express at your current level. You must first learn the function well. Then I will naturally say. Regarding the method of prohibited encryption, the method of calculation of prime numbers. When the prime number is very large, it is difficult to predict the prime number. Only by constantly consuming time to calculate one by one can the answer be possible. The calculation amount required is very large, so the method of prime number encryption is an extremely difficult method of restriction. In the dome, such restriction can even be said to be an unsolvable method..."

Ganqi started to be simple and interdisciplinary.

Everyone was confused and wrote the notes first.

The second peak of the unstoppable immortal heard this, he nodded and frowned while writing, while talking to himself: "2,3,5,7...211...409...2011...48097,48091...49993,499999"

If Gan Qi was here, he would definitely shout: This old bachelor who is over 6,000 years old is really a genius. He actually calculated with his heart and could calculate all the prime numbers within 50,000 in just a short time!

After class, Gan Qi was called to the second peak by Busong Xian. Busong Xian directly took out the prime number table he wrote for Gan Qi.

Gan Qi picked up a stack of paper, looked at it, looked at it again, looked at the paper again, and asked, "Is this all calculated by the master?"

The immortal nodded.

"How long has the master been forgetting?" Gan Qi asked again.

Buluoxian stroked his beard and replied, "It will take as long as you write these words, just forget it as long as you are a teacher."

"What?" Without pause, you can write it casually? This is not something that people can do, because if a slightly larger prime number is a prime number, the simple method of calculation is to determine whether it is a prime number through a large number of trial and error calculations.

The speed of writing prime numbers without turning down is almost paused at all, and the calculation volume of this brain is terrifying!

Gan Qi opened his mouth wide and exclaimed: "It's so terrifying!"

The immortal face was proud and replied: "Disciple, this method looks interesting. Master has learned it by understanding it all. The method of prohibition can be solved by the teacher."

Gan Qi didn't believe in evil and waved his hand: "No, Master hasn't known yet!"

"Hmm? What's the difficulty?" asked the Busong Xian.

Gan Qi gritted his teeth, stomped his feet, and wrote a number on the paper: 2^57885161-1

"This number is 57885160 times reduced by 2 at 57885160 times. Master calculates whether this number is a prime number." Gan Qi was cruel and vicious. He wanted to test how much the brain calculation amount of a person like the one who is not down to death is.

This number is the largest prime number discovered by humans over a period of time. If this number is written, there are 17 million digits.

The immortal frowned: "What is the power?"

"Look, 2 times 2 is the power of 2. Three 2 multiplied together is the power of 2. Master understands how accumulated it is?" Gan Qi looked at the immortal with some nervousness.

The Busong Xian nodded: "I understand, it's simple. In this way, you will understand as a teacher. When you are a teacher, you will calculate whether this number is a prime number."

Gan Qi nodded: "Haole, Master, please count slowly."

Gan Qi left with a nervous mood. If the immortals could really calculate this number clearly, it would be too scary. Then the method of encrypting prime numbers would be meaningless.

Gan Qi continued to be busy with sect restructuring and mathematics education.

The Immortals began to calculate. This time he didn't just forget it. He picked up the pen. At night, the Immortals disappeared into the Immortals and appeared in the forbidden area of ​​Yujing.

The two people who don’t fall into the sky and Yu Chong sat opposite each other. First, they briefly popularized the concept of Yu Chong.

Then Yu Chong spoke: "I didn't expect that the method of arithmetic has so many fun in it. I think this prime number is not difficult."

The immortal nodded: "I didn't think it was difficult either. Look at this number, it was left by my beloved disciple. Do you calculate it?"

"Let me take a look." Yu Chong did not take it and see it.

He popularized the immortal again: "The so-called power is..."

Yu focused on it: "It's easy to understand. Then this number is written..."

"You can write 17 million numbers." It is obvious that the immortal who does not fall into the sky first calculated this number in one day, and the calculation amount is also terrifying enough.

"Okay, then let's start confirming!" Yu Chong was full of confidence.

The immortal did not fall and nodded, and the two of them went in stages.

...

A few days later, Yu Chong looked up and looked at the immortal. The immortal face was as if he was withered and thin as a mortal old man.

The immortal also looked up at Yu Chong. He saw that Yu Chong's eyes were red, his eyes were black, and his hands pulled his hair off hand after hand!

The immortal said Gan Qi's line: "This number is so terrifying!"

Yu Chongshen nodded with it: "It's so terrifying!"

"It's not accessible to humans!" said the immortal again.

Yu Chong nodded: "The immortal power is also out of reach!"

"Who has the power to reach?" asked again.

Yu Chong thought for a while: "Maybe your beloved disciple is within reach!"

"Yes, yes, Gan Qi can write this number, so he must have access to it!" The immortal Busong was overjoyed and said, "I didn't expect that I had such talent, so he would be able to ascend!"
Chapter completed!