I acquired this one from a Brazilian chili grower and the F# was never mention. It came in a as packaged of many types. Let me know if you would like to try it.
I was very successful this season in producing many large pods across the board. This particular Brain Strain pod wasn't my largest, but still one to be respected. I have been fortunate to recruit great reviewers such as James who are able to tolerate these extreme super hot chilies...