2,147,483,647/Historical Note

Historical Note on $2 \, 147 \, 483 \, 647$
$2 \, 147 \, 483 \, 647$ was one of the Mersenne numbers that predicted to be prime in his  of $1644$.

It was who demonstrated it to be prime, which he did in $1772$.


 * : $2^{229} - 1$