Pyramids are distributed in many places on Earth, especially in Egypt. They are scattered throughout Upper Egypt, Middle Egypt and Lower Egypt with different sizes and shapes. The pharaohs - the kings of ancient Egypt - built these pyramids as tombs, symbolizing their power and supremacy. The pharaohs believed that they were the incarnation of gods, and building giant pyramids was a way to demonstrate their divine abilities and power.

Pyramids are not only symbols of power but also have great archaeological value. They contain unsolved mysteries, making them one of the eight wonders of the world. When archaeologists entered the Egyptian pyramids, they discovered a mysterious series of numbers: 142857. This series of numbers quickly attracted the attention of scientists and has been thoroughly studied to find out its meaning.

The number sequence 142857 is called the "turning door number" by experts. It is not just a sequence of numbers but also contains magical mathematical properties. When we multiply these numbers from 1 to 6, we get the following results:

• 142857 x 1 = 142857
• 142857 x 2 = 285714
• 142857 x 3 = 428571
• 142857 x 4 = 571428
• 142857 x 5 = 714285
• 142857 x 6 = 857142

These numbers have a rearrangement of the order of the digits but do not change their nature. In particular, when 142857 is multiplied by 7, the result is 999999, an astonishing result.

The number sequence 142857 does not stop there, it also contains many other mysteries. When we split 142857 into two parts: 142 and 857, and then add them together, we also get the result 999. This highlights the special properties of the number sequence. Furthermore, when we multiply 142857 by itself, we get the result 20408122449, and when we split it into two parts 20408 and 122449 and add them together, we return to 142857.

The magical properties of this number sequence have made mathematicians and mystery lovers more curious than ever. They want to know who left this number sequence, when it appeared and what story is behind it. However, due to limitations in technology and historical data, scientists have not been able to verify these things. Accordingly, up to now, only a few hypotheses have been put forward:

• Pyramid Architecture Code: Mathematicians believe that this series of numbers contains information about the proportions, size or structure of the pyramid.
• Cosmological code: Some theories suggest that the number sequence 142857 is related to physical constants or cosmic mysteries.
• Messages from Ancient Civilizations: Is this the message the ancient Egyptians wanted to pass on to future generations?

The number 142857 is not the only thing that makes the pyramid mysterious. The superior construction technology, the precision of the numbers and the positioning of the pyramid are also unsolved mysteries. How could the ancient Egyptians build these great structures without the aid of modern technology? These questions still pose a great challenge to scientists today.

The Egyptian pyramids, with their mysteries and magical number sequences, continue to be a great source of inspiration and challenge for scientists and explorers. The number sequence 142857 is just one of the countless mysteries that the pyramids contain, and it is a testament to the greatness of the ancient Egyptian civilization. These mysteries not only make the pyramids more mysterious but also affirm the intelligence and superior technical ability of the ancient Egyptians.

In the future, with the development of science and technology, it is hoped that these mysteries will gradually be revealed, giving us a deeper insight into this great civilization. Until then, the pyramids will continue to be a symbol of the greatness, wonder and unsolved mysteries of human history.

Duc Khuong