Your original point does not hold after correcting your 3-orders-of-magnitude error. The Guardian article estimates that bitcoin is on track to use 42 TWh of electricity this year. Your corrected estimate, 87 GW, is 762 TWh annually.Your contention that the Guardian article made an "outrageously large" estimate of bitcoin electricity consumption is contradicted by your own estimate, after you fixed the units-conversion mistake in it.
 How did you go from 2,079,720,000 KWHrs to 24.07 MW of electricity, 24/7?My calculator and Google (search for "2079720000 kWh per 24 hours to MW") says it's more than 86,000 MW (so ~86 GW).edit: corrected units from TW to GW, as pointed out by philipkglass
 86 GW, not 86 TW. 86 TW would be several times world primary energy consumption.
 You're right, thanks! It was an unfortunate typo.
 How are you getting that 2,079,720,000 KWHrs in 24 hours is 24.07 MW?EDIT: This is too perfect. 1053r calls out journalists for making a basic math mistake. In doing so, he makes a basic math mistake. I ask him about it, then get downvoted by HN.
 2,079,720,000 / 3600 / 24 = 24070.8333 KW, or 24.07 MW.
 Why are you dividing by 3600? The numerator is already in kWh units (kW hours), it's not kW seconds.
 Yup! Sorry! Will attempt to edit original. Should have said 86GW.

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