Prime numbers

Prime numbers are those with only two divisors, itself and 1. There are infinities and the smallest is 2.

For example, each number that appears in the following list is prime:

prime numbers

How many prime numbers are there?

The quantity is infinite and it was Euclid of Alexandria who proved it. Until today, nobody has found a formula to calculate all prime numbers.

What is the largest prime number known?

The largest known to humanity has more than 22 million digits.

The following explains how they have been calculated and their relationship to the perfect numbers:

Exercices

1. Prime numbers between 1 and 50:

    • Prime numbers between 1 and 50 →
      , , , , , , , , , , , , , y

2. Select the prime numbers:

    • 1.
    • 2.
    • 3.
    • 4.
    • 5.
    • 6.
    • 7.
    • 8.
    • 9.
    • 10.
    • 11.
    • 12.
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