I don't buy the aforementioned mistranslation theory on the number of the beast. And I'll tell you why.
It said that all would have to have the mark on their right hand or in their forehead, the exact word translating to the traditional Hindi location of the "third eye".
Now, something I read about several years ago in Popular Science was an ID chip that could be implanted in either of those locations, from where it would be able to derive the most power thermovoltaicly.
These chips have been suggested for convicts, because they can be read from a distance and so would virtually eliminate the need for headcounts in prison. As they use body heat for a power source, if they're cut out, they fail to broadcast their locator signal that is the id number of the chip. Said ID is a UIN consisting of three tiers of six digits each. Six, six, six.
Similar chips are already being used by rich people to tag their pets.