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The average electricity used per block mined is around 3 Gwh which costs in the $200-400k ballpark collectively (I know they seek cheaper electricity, but I'm unsure how cheap or what discounts they get.)

(Approximated by Bitcoin's reported .5% share of global electricity consumption, which is around 25k Twh. A block is mined every ten minutes. Hopefully I didn't make any order-of-magnitude errors!)

ViaBTC, the winning pool, has about 13% of the global hashing power so perhaps spent $40k plus their other expenses.



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