9941

Number
$9941$ (nine thousand, nine hundred and forty-one) is:


 * The $1226$th prime number


 * The index of the $22$nd Mersenne prime after $2$, $3$, $5$, $7$, $13$, $17$, $19$, $31$, $61$, $89$, $107$, $127$, $521$, $607$, $1279$, $2203$, $2281$, $3217$, $4253$, $4423$, $9689$:
 * $M_{9941} = 2^{9941} - 1 \approx 3 \cdotp 461 \times 10^{2992}$