# What is the highest number ever discovered?

## What is the highest number ever discovered?

The Great Internet Mersenne Prime Search (GIMPS) has discovered the largest known prime number, 2^82,589,933 – 1, having 24,862,048 digits.

## Is 127 a Mersenne prime?

(sequence A000043 in the OEIS) and the resulting Mersenne primes are 3, 7, 31, 127, 8191, 131071, 524287, 2147483647, (sequence A000668 in the OEIS). Numbers of the form Mn = 2n − 1 without the primality requirement may be called Mersenne numbers.

How do you calculate Mersenne prime?

If the sum of divisors of a number (excluding the number itself) equals the number, the number is a perfect number. Perfect numbers are related to Mersenne primes. To find a perfect number, calculate 2n-1 (2n – 1) where n is the number used to obtain a Mersenne prime.

### What is the least prime number?

2
2 is the smallest prime number. It also the only even prime number – all other even numbers can be divided by themselves, 1 and 2 at least, meaning they will have at least 3 factors.

### Is 127 a prime number?

127 is the 31st prime number and therefore it is the smallest Mersenne prime with a Mersenne prime index.

Are there infinite Mersenne primes?

Additional evidence, is that since prime numbers are infinite, there exist an infinite number of Mersenne numbers of form 2p – 1, meaning there exist an infinite number of Mersenne numbers that are candidates for Mersenne primes. However, as with 211 – 1, we know not all Mersenne numbers of form 2p – 1 are primes.

#### How much money do you get for finding a prime number?

\$50,000 to the first individual or group who discovers a prime number with at least 1,000,000 decimal digits (awarded Apr. 6, 2000) \$100,000 to the first individual or group who discovers a prime number with at least 10,000,000 decimal digits (awarded Oct. 22, 2009)

#### Is eleven prime or composite?

prime number
Yes, 11 is a prime number. The number 11 is divisible only by 1 and the number itself. For a number to be classified as a prime number, it should have exactly two factors. Since 11 has exactly two factors, i.e. 1 and 11, it is a prime number.

What is a Mersenne prime?

In mathematics, a Mersenne prime is a prime number that is one less than a power of two. That is, it is a prime number of the form Mn = 2n − 1 for some integer n.

## How do you find the Mersenne-Fermat number of a prime number?

2 pr − 1 − 1, with p prime, r natural number, and can be written as MF (p, r). When r = 1, it is a Mersenne number. When p = 2, it is a Fermat number. The only known Mersenne–Fermat primes with r > 1 are

## What is the smallest and largest Mersenne prime number?

The smallest composite Mersenne number with prime exponent n is 2 11 − 1 = 2047 = 23 × 89. Mersenne primes M p are also noteworthy due to their connection to perfect numbers. As of June 2019, 51 Mersenne primes are now known. The largest known prime number 2 82,589,933 − 1 is a Mersenne prime.

What is a Mersenne number?

That is, it is a prime number of the form Mn = 2n − 1 for some integer n. They are named after Marin Mersenne, a French Minim friar, who studied them in the early 17th century.