Question 1

What does this tool do?

Accepted Answer

It generates prime numbers: either all primes in a min–max range or the first N primes.

Question 2

What range or count can I use?

Accepted Answer

Range is limited (e.g. up to 1e6) and count up to a few thousand to keep the browser responsive.

Question 3

Are there accuracy limits?

Accepted Answer

Primes are computed with trial division. Very large ranges may take longer.

Question 4

Is generation done locally?

Accepted Answer

Yes. All computation runs in your browser; nothing is sent to a server.

Question 5

When is this useful?

Accepted Answer

Use it for math homework, cryptography examples, or to get a list of primes for algorithms.

Question 6

Why is the list empty?

Accepted Answer

Check that min ≤ max and that the range contains primes (e.g. 2 is the only even prime).

Prime Number Generator

Frequently Asked Questions