Mathlean · Online math workspace
Jacobi symbol calculator
Evaluate the Jacobi symbol for integer numerator and odd positive denominator.
How to use this calculator
Edit JacobiSymbol(a,n). The starter returns 1 for (5,11).
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
A Jacobi symbol of 1 does not guarantee a quadratic residue for a composite denominator.
Mathlean combines visual mathematical input with computation and canvas tools. Results depend on the expression and available engine support; check important answers independently.