Question

how to prime numbers formula

Answer 1

Repeat forever or until bored. The integers come in 4 flavors: composites, primes, units (1 and -1), and zero. 2 is the first prime and every multiple of it is composite (because they have 2 as a factor). If you mark every multiple of 2, you'll be marking only composite numbers

Answer 2

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Formula:

● 6n + 1 OR 6n - 1

Such formula can be used to find prime numbers where n is natural number by putting n value without multiples of 2,3,5,7,11 .