**Archimedes of Syracuse**(287–212 BC), one of the greatest mathematicians of the ancient world.

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The first calculation of π was done by **Archimedes of Syracuse** (287–212 BC), one of the greatest mathematicians of the ancient world.

Archimedes’ method finds an approximation of pi **by determining the length of the perimeter of a polygon inscribed within a circle (which is less than the circumference of the circle) and the perimeter of a polygon circumscribed outside a circle (which is greater than the circumference)**.

There are essentially 3 different methods to calculate pi to many decimals. One of the oldest is to use the **power series expansion of atan(x) = x – x^3/3 + x^5/5 –** … together with formulas like pi = 16*atan(1/5) – 4*atan(1/239). This gives about 1.4 decimals per term.

Where did it come from? The use of pi is **dated back to the Babylonians about 4,000 years ago with calculations for the area of a circle**. At that time, an approximation of “3 times the square of the radius of the circle” was used, which returned a value of pi = 3.

What did Aryabhata discover? Aryabhata **discovered an approximation of pi**, 62832/20000 = 3.1416. He also correctly believed that the planets and the Moon shine by reflected sunlight and that the motion of the stars is due to Earth’s rotation.

Supercomputer took **108 days** to run the calculations.

Archimedes computed upper and lower bounds of π by drawing a regular hexagon inside and outside a circle, and successively doubling the number of sides until he reached a 96-sided regular polygon. By calculating the perimeters of these polygons, he proved that **22371 < π < 227** (that is 3.1408 < π < 3.1429).

More than 4700 years ago, the famous Indian mathematician and astronomer Aryabhatta (b. 2765 BC) gave 62832/20000 = 31416/10000 = 3.1416 as an approximation of π [21]. He calculated π **by measuring the diameter of the circle in a remainderless unit and then measuring the circumference in the same unit.**

It is known that π is an irrational number and therefore cannot be expressed as a common fraction. Its value is approximately equal to 3.141592. Since Archimedes was one of the first persons to suggest a rational approximation of **22/7** for π, it is sometimes referred to as Archimedes’ constant.

**Technically no**, though no one has ever been able to find a true end to the number. It’s actually considered an “irrational” number, because it keeps going in a way that we can’t quite calculate. Pi dates back to 250 BCE by a Greek mathematician Archimedes, who used polygons to determine the circumference.

All records are made to be broken, and Emma Haruka Iwao’s 2019 record of 31.4 trillion digits was broken with **50 trillion digits** calculated by Timothy Mullican in January 2020.

When it comes to how many digits of pi people know by heart, the majority only know **3.14**. Which is fine! Unless you’re building a bridge, that’s the most you will really need to know. If you can get to the first 3 after the decimal point, you’re in the top 5 percent of pi memorizers.

The first modern equivalent of numeral zero comes from **a Hindu astronomer and mathematician Brahmagupta** in 628. His symbol to depict the numeral was a dot underneath a number.

**Pi cannot be defined as even or odd** because its not an integer,its an irrational number. Rational and irrational numbers can neither be even nor odd.

Archimedes was born about 287 BCE in Syracuse on the island of Sicily. He died in that same city when the Romans captured it following a siege that ended in either 212 or 211 BCE. One story told about Archimedes’ death is that **he was killed by a Roman soldier** after he refused to leave his mathematical work.

Aryabhata, first unmanned Earth satellite built by India. It was named for a prominent Indian astronomer and mathematician of the 5th century ce. The satellite was assembled at Peenya, near Bangalore, but was launched from within the Soviet Union by **a Russian-made rocket** on April 19, 1975.

**Aryabhata** is the first of the great astronomers of the classical age of India. He was born in 476 AD in Ashmaka but later lived in Kusumapura, which his commentator Bhaskara I (629 AD) identifies with Patilputra (modern Patna). Aryabhata gave the world the digit “0” (zero) for which he became immortal.

Aryabhatta was an extraordinary teacher and scholar who had immense knowledge about mathematics and astronomy. He suggested **the heliocentric theory** which proved that the sun is located in the centre of the solar system and all the planets revolve around it.

Pi is the 16th letter of the Greek alphabet just as p is the 16th of our alphabet. … **The first 144 digits of pi add up to 666**, the Number of the Beast in the Book of Revelation. 6. Albert Einstein was born on Pi Day: March 14, 1879.

**Liu Hui** was the first Chinese mathematician to provide a rigorous algorithm for calculation of π to any accuracy. … Later he invented an ingenious quick method to improve on it, and obtained π ≈ 3.1416 with only a 96-gon, with an accuracy comparable to that from a 1536-gon.

Archimedes introduced a new classification of numbers. He said that ‘first order’ numbers went up to a myriad myriads, meaning 10,000 x 10,000. We would write this as 100 million, or 100,000,000, or 108. … But **Archimedes was not content with discovering this huge number**.

Polygon approximation to a circle It is not known why Archimedes stopped at a **96-sided** polygon; it only takes patience to extend the computations.

“Zero and its operation are first defined by **[Hindu astronomer and mathematician] Brahmagupta** in 628,” said Gobets. He developed a symbol for zero: a dot underneath numbers.

Aryabhatta was the first mathematician, astronomer and scientist of India who created or discovered the **number zero**, the place value system, algebraic identities, trigonometrical functions, the value of pi, the shape of the solar system and the whole concept of rotation and revolution of planets.

355113 is the best rational approximation of π with a denominator of four digits or fewer, being accurate to six decimal places. It is **within 0.000009% of the value** of π, or in terms of common fractions overestimates π by less than 13748629.

It was not until the 18th century — about two millennia after the significance of the number 3.14 was first calculated by Archimedes — that the name “pi” was first used to denote the number. … “He used it **because the Greek letter Pi corresponds with the letter ‘P’**… and pi is about the perimeter of the circle.”

Archimedes was the greatest mathematician of his age. His contributions in geometry revolutionised the subject and his methods anticipated **the integral calculus**. He was a practical man who invented a wide variety of machines including pulleys and the Archimidean screw pumping device.

So far, all the decimal arithmetic we’ve done has involved decimal numbers with a finite number of decimal places. However, **sometimes decimal numbers are infinite**. Make sure you don’t confuse “infinite decimal” with “infinitesimal.” Although a number can sometimes be both, they’re not the same thing.

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In decimal form, the value of pi is **approximately 3.14**. But pi is an irrational number, meaning that its decimal form neither ends (like 1/4 = 0.25) nor becomes repetitive (like 1/6 = 0.166666…). (To only 18 decimal places, pi is 3.141592653589793238.)

Emma Haruka Iwao, a Google employee, has broken the Guinness world record for calculating the most digits of pi. Iwao and a Google team computed pi to 31.4 trillion decimal places or **pi multiplied by 10 to the 13th power**, ousting the previous record set in 2016 of 22.4 trillion digits.

Pi (or π) is the most widely known mathematical symbol. The fascinating thing about pi is that it is an irrational number — it cannot be expressed as a fraction and its decimal expansion never ends and never repeats. … This means that **the exact value is never known**, as the number never ends!

The world champion is **Akira Haraguchi**, who in 2006 recited 100,000 digits of pi from memory at a public event near Tokyo. It took him 16hrs 30mins.

While the world record for this is being held by Chao Lu of Shaanxi province in China in 2005 for memorising 67,890 digits of the value of Pi recited in **24 hours and eight minutes**, Rajveer has made an attempt to memorise 70,000 digits in just nine hours, seven minutes.

In number theory, 1 is the value of Legendre’s constant, which was introduced in 1808 by **Adrien-Marie Legendre** in expressing the asymptotic behavior of the prime-counting function.

**Computer scientists Vinton Cerf and Bob Kahn** are credited with inventing the Internet communication protocols we use today and the system referred to as the Internet.

Credit for our modern version of the school system usually goes to **Horace Mann**. When he became Secretary of Education in Massachusetts in 1837, he set forth his vision for a system of professional teachers who would teach students an organized curriculum of basic content.