Mathlean · Online math workspace
Nth prime calculator
Find a prime by its one-based position in the ordered prime sequence.
How to use this calculator
Edit the index. The tenth prime is 29.
Tap the math below to edit it and see the result. Once a result is ready, press Tab on a hardware keyboard to accept it. Outside a matrix, Return completes the line; the phone math keyboard has the same Return action.
Try it here
Interactive tools require JavaScript. You can read the guide and example without it.
What to know
The index must be a positive integer; large indices may take too long to compute.
Mathlean combines visual mathematical input with computation and canvas tools. Results depend on the expression and available engine support; check important answers independently.