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For challenges about identifying and manipulating prime numbers
1
vote
Do I have a prime twin?
JavaScript(ES6), 54 bytes
a=x=>f(x)&(f(x+2)|f(x-2));f=(n,x=n)=>n%--x?f(n,x):x==1
a=x=>f(x)&(f(x+2)|f(x-2));f=(n,x=n)=>n%--x?f(n,x):x==1
console.log("True")
console.log("------------------ …