Mickey and Minnie just bought a zero coupon bond for $$597\mathrm{.}97,$ but they cannot recall when it matures. The yield to maturity equals $5\mathrm{.}2\%.$ Can you help Mickey and Minnie? The bond's face value is $$1000.($Assume annual discounting$)($Enter your answer in years and round to $2$ decimal places.$)$

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