One more ID, cactus

One more, this one I'd like to plant outside if it's hardy enough but I've Googled everything I could think of and came up with nothing. Does this look familiar to anybody? It's about 4" tall and I got it at the local 5 and dime store and they had no idea what it was. I'm pretty sure this one is of the cactus family.

Thanks!
Farelle

 

Looks to me like it could be a type of cactus called cereus huilunchu.

Debi

 

I think it is probably Stenocereus pruinosus.

 

yeah.....I'd say you are right on!!

 

That's it!! Thank you so very much!