# 2281

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## Number

$2281$ (two thousand, two hundred and eighty-one) is:

The $339$th prime number

The index of the $17$th Mersenne prime after $2$, $3$, $5$, $7$, $13$, $17$, $19$, $31$, $61$, $89$, $107$, $127$, $521$, $607$, $1279$, $2203$:
$M_{2281} = 2^{2281} - 1 \approx 4 \cdotp 461 \times 10^{686}$