"Bang, clang."

The slowed down Mercedes-Benz G63 ran over the speed bump at the entrance of the underground garage and drove into the underground parking lot of Wanliu Academy, and the Mercedes-Benz stopped in the parking space.

"Whew~~~"

The Mercedes-Benz stopped steadily, Han Sen leaned comfortably on the car, pinched the bow tie, twisted his neck, loosened the shackles of the bow tie, and felt a lot more comfortable, he found that his time was no longer his time recently.

After meeting Academician Sun Chun of the Chinese Academy of Sciences, Han Sen put down the modern cryptography he was preparing to write, and he joined the National Quantum Communication Research Group as the deputy head of the Cryptography Group of the Chinese Academy of Sciences.

Quantum communication, from the day it was born, has been controversial, and countless hackers have taken cracking quantum communication as the goal, which is very embarrassing, the main advantage of quantum communication is "security", but it has been abused countless times by hackers, and every encryption upgrade is an exciting challenge for hackers around the world.

This is science, and the birth of every new thing is first faced with the test of destruction, which is also the gift of "nirvana" sent by the world to the new life.

Han Sen knows that quantum communication, while controversial, is one of the safest options for information transfer.

Finance, the most important thing is security, only quantum communication can ensure the safe transmission of financial information, then Han Sen's cross-regional financial payment, clearing has technical support, when the technology is sufficient, the hegemony of the dollar is weakened, international finance can be completely "decentralized".

The main idea of the current international monetary system is the Jamaican system.

Compared with the situation under the Bretton Woods system in which the structure of international reserves is single and the status of the US dollar is very prominent, under the Jamaican system, international reserves are diversified, and although the US dollar is still the dominant international currency, the US dollar's status has been significantly weakened, and the situation of the US dollar monopolizing foreign exchange reserves no longer exists. International reserve currencies have become increasingly diversified.

This has laid a good foundation for cross-regional settlement payments, after all, the dollar is no longer a hegemon, and there is much less pressure to challenge it.

Next, as long as there is a sufficiently secure information transmission and a sufficiently robust exchange rate processing system, the cross-regional payment and clearing in Hansen's paper will become a reality.

Of course, there was still a long way to go, and Han Sen didn't know what the upper echelons really thought, anyway, since he had a report meeting in Yanjiao, Han Sen hadn't heard any news.

......

"I'm back."

Unscrewed the door, and as soon as he entered the door, the beautiful little Qin Jing was in simple home clothes.

However, simple home clothes were very tempting, and Han Sen leaned into Qin Jing's arms like a coquette: "I'm tired, I want to kiss you!" ”

Taking away the dishonest big hand on himself, Qin Jing said shyly: "Don't, hate it!" ”

"Hahaha~"

......

The days passed day by day, and the whole summer had left, and Han Sen's Mercedes-Benz car no longer needed to turn on the cold wind, and during the drive, he fell into the parking lot, and a falling leaf fell into the car with the wind.

Zhang Bin independently published a top-level SCI paper on his own, and recently he was overjoyed.

Even Han Sen's little Qin Jing began to contact surgery in the hospital, and almost dissected Han Sen at night.

And Han Sen ran to the research institute of the Chinese Academy of Sciences day after day, and there was no change.

The days seem to be dull, but the accumulation of slight changes day by day, as long as you can endure loneliness and persevere, there will always be great changes.

......

"Hello Professor Han."

"Hello."

Dressed in a well-fitting suit, with a straight chest, the tall Han Sen still looks very comfortable, this is the real top elite, the working masses determine the development of history, but the "elite" like Han Sen is also influencing the development trend.

Han Sen walked into the Chinese Academy of Sciences, the familiar teaching and research room, there were a few more unfamiliar people, Han Sen said to Sun Chun: "Who are these people?" ”

Sun Chun smiled and opened his mouth to introduce Han Sen: "I heard that you have achieved results, everyone is here, this is Nan Zhiguang of Shandong University, academician Nan, an expert in topology, and the deputy chief engineer of our quantum communication project, you are fellow countrymen." ”

"Hello Academician Nan."

Nan Zhiguang spoke in the familiar Qilu dialect: "Professor Han, you are young and promising!" ”

"Where, where!"

Then the next one: "This is your Tsinghua University's Pu Shouji, Academician Pu, an expert in quantum engineering, and also a deputy chief engineer." ”

There are a lot of people in the teaching and research department today, and all the leaders of the entire quantum communication project team have come from all over the country, this is a controversial project, everyone sitting in the teaching and research department is under strong pressure, they don't have a deep understanding of this young Han Sen, but when they heard that there are results, everyone hurried over as if they had grasped the "life-saving straw".

There were many people in the teaching and research department, and there were also many strangers, but Sun Chun only introduced these two to Han Sen.

Han Sen didn't have any nonsense, stood in front of the blackboard, took off his blazer, picked up a piece of chalk, and said, "Hello everyone, everyone is very busy, so I won't be verbose." ”

After speaking, he simply rolled up his sleeves, Han Sen picked up the chalk and wrote a line of equations on the blackboard: 3*5/3.8*7/5.8*11/9.8*13/11.8*......*P/(P-1.2)-1=M

Of course, all of you here are top scholars, and of course you can see at a glance that this is a Mersenne prime, the so-called Mersenne number, which refers to a class of numbers like 2p-1, where the exponent p is a positive integer, often recorded as Mp.

It is very difficult to decompose a large number into the product of several prime numbers, but it is much easier to multiply several prime numbers together. In this cipher design, large prime numbers need to be used, and the larger the prime, the less likely it is that the password will be deciphered.

All passwords and communications are inseparable from Mersenne primes.

In the teaching and research department, a group of experts and scholars watched with interest, for this project, each of them has worked hard in various ways, and of course has also studied Mersenne primes.

On the podium, Han Sen continued: "Here, we should pay attention to a prime number that is a Mersenne prime, and it is never a factor number of the Mersenne composite number, which should be noted. ”

Soon, someone in the teaching and research department couldn't keep up with Han Sen's train of thought, and began to take out his mobile phone to record it.

In the teaching and research room, Han Sen quickly filled a blackboard, for him, the idea was a matter of course, for several months, Han Sen read all kinds of materials, did countless thoughts, at this time, the highly operational brain sorted out and output Han Sen's ideas in an orderly manner.

"Wow~", pushed the blackboard up, pulled down a new blackboard, and continued to talk while writing: "In the 2^N-1 sequence, if the exponent is greater than 6, in addition to the Mersen prime, there are one or more new primes as factor numbers, and the new factor number minus 1 can be divisible by this exponent. ”

In the quiet teaching and research room, with the sound of notes, more than a dozen scholars in the last row had already run to the corridor, and one by one they began to beat faster, some of them may not have kept up with Han Sen's train of thought, but with Han Sen's explanation, they seemed to understand something, and the "dammed lake" that was firmly blocked in their minds was slowly being washed away.