Tell us what’s happening:
11 is a prime number so the code should return true. However; it’s failing with: “lucasLehmer(11) should return false”. Everything else works just fine.
Your code so far
function lucasLehmer§ {
if (p < 2) {
return false
}
let root = Math.ceil(Math.sqrt§);
for(let i = 2; i<=root; i++) {
if(p % i === 0) {
return false;
}
}
return true;
}
console.log(lucasLehmer(11)); true
console.log(lucasLehmer(15)); false
console.log(lucasLehmer(13)); true
console.log(lucasLehmer(17)); true
console.log(lucasLehmer(19)); true
console.log(lucasLehmer(21)); false
Your browser information:
User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Firefox/78.0
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Challenge: Lucas-Lehmer test
Link to the challenge: