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.
Squares of primes.
53
All numbers that are the square of primes have exactly 3 factors.
The numbers 11 and 13 are prime twins. Prime twins are consecutive prime numbers that differ by a difference of two. For example, 3 and 5, 7 and 9 are twin primes.
Factors are prime numbers. The primes hidden in the number 30 are: 2,3, and 5.
There are 9592 primes.
There are infinite prime numbers as there is infinite numbers. You cannot limit the counting of primes.
There are 25 primes in 1-100.
There are two primes in the nineties: 91 and 97
There are infinitely many primes. There are 24 prime numbers between 1 and 100
All prime numbers greater than 2 are odd numbers. For an odd prime to be written as the sum of two primes, one of the primes must be 2 because two odd primes will produce an even sum. 11 cannot be written as the sum of two primes. 13 = 2 + 11. 17 cannot be written as the sum of two primes. 19 = 2 + 17.
There are infinitely many primes, not just two. The first two are 2 and 3.
There are 25 primes smaller than 100.
Real numbers, imaginary numbers and irrational numbers are three kinds of numbers. Others are rational numbers, algebraic numbers and primes numbers. There are many more.
There is just one group: 2 and 3. No other primes are consecutive.
An n-digit number has 4^n such numbers.
Five of them.