A physicist has worked out how many calculations have happened since the Big Bang.
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References
Lloyd, S. Computational capacity of the Universe. Physical Review Letters 88, 237901, (2002).
Lloyd, S. Ultimate physical limits to computation. Nature 406, 1047 - 1054 (2000).
Wolfram, S. A New Kind of Science. (Wolfram Media, 2002).
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Massachusetts Institute of Technology
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Ball, P. Universe is a computer. Nature (2002). https://doi.org/10.1038/news020527-16
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DOI: https://doi.org/10.1038/news020527-16
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