1153

Number
$1153$ (one thousand one hundred and fifty-three) is:


 * The $191$st prime number


 * The $18$th Proth prime after $3$, $5$, $13$, $17$, $41$, $\ldots$, $449$, $577$, $641$, $673$, $769$, $929$:
 * $1153 = 9 \times 2^7 + 1$


 * The smaller of the $20$th pair of primes whose prime gap is $10$:
 * $1163 - 1153 = 10$


 * The larger of the $41$st pair of twin primes:
 * $1153 - 1151 = 2$