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The most stable isotope of hassium cannot be determined based on existing data due to uncertainty that arises from the low number of measurements. The confidence interval of half-life of 269Hs corresponding to one standard deviation is, based on existing data, 7001160000000000000♠16±6 seconds, whereas that of 270Hs is 7000900000000000000♠9±4 seconds. It is also possible that 277mHs is more stable than both of these, with its half-life likely being 7002110000000000000♠110±70 seconds, but only one event of decay of this isotope has been registered ажурирано: 2016.[ажурирање].[1][2]