3281
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Number
$3281$ (three thousand, two hundred and eighty-one) is:
- $17 \times 193$
- The $15$th Fermat pseudoprime to base $3$ after $91$, $121$, $286$, $671$, $703$, $949$, $1105$, $1541$, $1729$, $1891$, $2465$, $2665$, $2701$, $2821$:
- $3^{3281} \equiv 3 \pmod {3281}$