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[Golang] Primality Test - Optimized School Method
source link: http://siongui.github.io/2017/04/19/go-primality-test-optimized-school-method/
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[Golang] Primality Test - Optimized School Method
April 19, 2017
Go implementation of primality test - optimized school method. [1]
package main
import (
"fmt"
)
func IsPrime(n int) bool {
// Corner cases
if n <= 1 {
return false
}
if n <= 3 {
return true
}
// This is checked so that we can skip
// middle five numbers in below loop
if n%2 == 0 || n%3 == 0 {
return false
}
for i := 5; i*i <= n; i = i + 6 {
if n%i == 0 || n%(i+2) == 0 {
return false
}
}
return true
}
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