3281

Number
$3281$ (three thousand, two hundred and eighty-one) is:


 * $17 \times 193$


 * The $15$th Fermat pseudoprime to base $3$ after $91$, $121$, $286$, $671$, $703$, $949$, $1105$, $1541$, $1729$, $1891$, $2465$, $2665$, $2701$, $2821$:
 * $3^{3281} \equiv 3 \pmod {3281}$