4253

Number
$4253$ (four thousand, two hundred and fifty-three) is:


 * The $583$th prime number


 * The index of the $19$th Mersenne prime after $2$, $3$, $5$, $7$, $13$, $17$, $19$, $31$, $61$, $89$, $107$, $127$, $521$, $607$, $1279$, $2203$, $2281$, $3217$:
 * $M_{4253} = 2^{4253} - 1 \approx 1 \cdotp 908 \times 10^{1280}$