179

Number
$179$ (one hundred and seventy-nine) is:


 * The $41$st prime number


 * The $1$st of the $13$th pair of twin primes, with $181$


 * The $14$th Sophie Germain prime after $2, 3, 5, 11, 23, 29, 41, 53, 83, 89, 113, 131, 173$:
 * $2 \times 179 + 1 = 359$, which is prime.


 * The $14$th emirp after $13, 17, 31, 37, 71, 73, 79, 97, 107, 113, 149, 157, 167$


 * The $2$nd term after $89$ of the smallest sequence of $6$ primes formed by doubling and adding one:
 * $\left({89, 179, 359, 719, 1439, 2879}\right)$


 * The $35$th positive integer $n$ such that no factorial of an integer can end with $n$ zeroes.