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There is infinite amount of prime numbers. The largest known Prime number is 243,112,609 − 1. It is a number with thirteen million digits. Greek mathematician Euclid proved it with the fact that if you multiply any given set of prime numbers and ad 1 you get either a prime number, or one that has smaller prime numbers - none of which is part of the original set.

Example set: 2, 3, 5

2*3*5=30

30+1=31

Because of the added one, 31 is not divisible by 2, by 3, or by 5. (In this case, it happens to be a prime number.)

For more info and more proofs that there is infinite number of prime numbers, check related link.

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