What is the highest temperature a superconductor can work at today?

[Chemist@]

What is the highest temperature a superconductor can work today?

 

[zhanghe]

The superconductor with the highest transition temperature that has been confirmed by more than one independent research groups (a prerequisite to be called a discovery) is mercury barium calcium copper oxide (HgBa2Ca2Cu3O8) at around 133 K.
"From wiki :)"
http://en.wikipedia.org/wiki/High-temperature_superconductivity#cite_note-Schi-10

 

[Chemist@]

Thanks for the reply. It will probably take some time to discover some that can work on less extreme temperatures.