Assertion: polonium's life | /r/HasProperty | estimated to the nearest 1017 years
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text: (e.g. the half-life of 209Bi is estimated to the nearest 1017 years), but we have many figures from NUBASE (or our isotopes pages) where at least five significant digits, of which at least three are after the decimal point, are given on a comparable timescale (e.g. 203Hg = 46.595 d;