first commit

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2026-09-08 20:28:54 +08:00
commit 2ada8d3d5a
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exports = function(num) {
var boundary = Math.floor(Math.sqrt(num));
for (var i = 2; i <= boundary; i++) {
if (num % i === 0) {
return false;
}
}
return num >= 2;
};
module.exports = exports;