8,388,607/Historical Note

Historical Note on $8 \, 388 \, 607$

$8 \, 388 \, 607$ was the $2$nd Mersenne number to be demonstrated composite.

This was done in $1640$ by Pierre de Fermat, who demonstrated it had $47$ as a divisor.

Sources

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