811

Number
$811$ (eight hundred and eleven) is:


 * The $141$st prime number.


 * The smaller of the $14$th pair of primes whose prime gap is $10$:
 * $821 - 811 = 10$


 * The $2$nd of the $31$st pair of twin primes:
 * $811 - 809 = 2$


 * The $49$th long period prime after $7$, $17$, $19$, $23$, $29$, $\ldots$, $701$, $709$, $727$, $743$

Also see