4 ms·
Why not just function isPrime(n) { return !/^1?$|^(11+?)\1+$/.test(Array(n+1).join('1')) } then? :]
by myfonj 12y ago
Why not just
function isPrime(n) {
return !/^1?$|^(11+?)\1+$/.test(Array(n+1).join('1'))
}
then? :]
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