1279
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Number
$1279$ (one thousand, two hundred and seventy-nine) is:
- The $207$th prime number
- The index of the $15$th Mersenne prime after $2$, $3$, $5$, $7$, $13$, $17$, $19$, $31$, $61$, $89$, $107$, $127$, $521$, $607$:
- $M_{1279} = 2^{1279} - 1 \approx 1 \cdotp 041 \times 10^{385}$
- The larger of the $43$rd pair of twin primes:
- $1279 - 1277 = 2$
Also see
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