A million? A million? That’s like what, 20 bits? Well gosh that should keep the NSA busy for a while.
Holy crap that’s a bad deal.
And for the record, this is not an electromechanical prime number calculator. It’s a regular, all-electric computer, with an electromechanical display.
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Going-going-gone. I figured that the remaining 20 or so would not last long after this appeared on Boing-Boing, but I thought they might at least last a day. Nope.
I got mine 
Push button, receive prime.
Cool desk toy for a computer nerd.
A video about this object can be found in the Numberphile channel:
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