19,937

Number
$19 \, 937$ (nineteen thousand, nine hundred and thirty-seven) is:


 * The $2254$th prime number


 * The index of the $24$th Mersenne prime after $2$, $3$, $5$, $7$, $13$, $\ldots$, $2203$, $2281$, $3217$, $4253$, $4423$, $9689$, $9941$, $11 \, 213$:
 * $M_{19 \, 937} = 2^{19 \, 937} - 1 \approx 4 \cdotp 315 \times 10^{6001}$