Prime generator
Generate all primes in an integer range, normalizing reversed ranges and limiting oversized input.
Runs in your browserEvery computation happens in your browser — your data never leaves this device.
Range
Primes
Prime list
Enter a range to generate
: 0 · : 0
What this tool does
- Generate prime lists
- Verify primes for teaching
Example
Input
1,20
Output
2, 3, 5, 7, 11, 13, 17, 19
Both range endpoints are included by default.
Frequently asked questions
Is 1 prime?
No, the smallest prime is 2.
Can the range be reversed?
Yes, endpoints are swapped.
What about a huge range?
Ranges wider than one million are rejected.
Keywords：质数素数prime范围