name this cactus?

I'm looking for the name of this cactus. I can't keep it but its huge and really neat, soI was hoping to find the name so I could post a take it home free or sell it or something before I have to sell my house. Thanks!

 

I'd say it is a enormous Euphorbia.

Welcome to the Forum!

 

Do the flowers look like attached pic?

 

Yes! Do you know the name?

 

Yes, Euphorbia (which are not cacti). The picture is not very clear, but it resembles trigona, a common species in cultivation.

 

My pic is Euphorbia triangularis - I can't tell what yours might be. Need close up pic.