2047/Historical Note

Historical Note on $2047$

$2047$ was the $1$st Mersenne number that was demonstrated to be composite.

This was done in $1636$ by Hudalrichus Regius, who demonstrated it to be $23 \times 89$.


Sources

  • 1919: Leonard Eugene Dickson: History of the Theory of Numbers: Volume $\text { I }$ ... (previous) ... (next): Preface
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