There are 2 repositories under number-theoretic-transform topic.
Reed-Solomon coder computing one million parity blocks at 1 GB/s. O(N*log(N)) algo employing FFT.
Finite Field Operations on GPGPU
Efficient Algorithm Level Error Detection for Number-Theoretic Transform
:butterfly: Integer Fast Fourier Transform algorithms for JavaScript
Computations with the Mertens function. To accompany a preprint manuscript (http://arxiv.org/abs/2102.05842).