59,961

Number
$59 \, 961$ (fifty-nine thousand, nine hundred and sixty-one) is:


 * $3 \times 11 \times 23 \times 79$


 * The $25$th and largest known integer $n$ after $3$, $4$, $5$, $6$, $7$, $8$, $10$, $15$, $19$, $41$, $59$, $61$, $105$, $160$, $661$, $2653$, $3069$, $3943$, $4053$, $4998$, $8275$, $9158$, $11 \, 164$, $43 \, 592$ such that $m = \ds \sum_{k \mathop = 0}^{n - 1} \paren {-1}^k \paren {n - k}!$ is prime