thanks for the response. I realized that I didn't mention which partition the luks container resides in: sda5, which doesn't exist anymore but shows up as, I believe, sda4. That said, I was wondering what you meant by
Use 'a' to manually add a partition beginning at the same location than the LUKS partition found by TestDisk and ending at the end of the disk or just before the next partition.
Set this partition as MS Data, LUKS, P(rimary).
Would I need to know the beginning and end of the luks container to use this? I didn't record any information about the partition table prior to using testdisk as the interface had me believe that it would detect everything just fine.
On another note, I ran testdisk on a backup that I made of the partition 6 months ago and the luks container is showing up as "Unknown". the backup is detected just fine by my bootloader and behaves as expected and I would like the version that got messed up to behave in the same way that my backup is. Does that mean that I would have to change the partition type to "unknown"? I had also checked gparted and the partition is showing up as an NTFS partition, instead of a LUKS on LVM partition. Thanks.