> Workspace is not required for FFTs of following sizes:

> - Powers of 2 up to 32768

> - Powers of 3 up to 19683

> - Powers of 5 up to 15625

> - Powers of 6 up to 1296

> - Powers of 7 up to 2401

> - Powers of 10 up to 10000

> - Powers of 11 up to 1331

> - Powers of 12 up to 1728

> In the future versions of cuFFTDx:

>   - Workspace requirement may be removed for other configurations.

>   - FFT configurations that do not require workspace will continue to do so.