// IsPrime64 checks if an int64 is prime
IsPrime64 checks if an int64 is prime
// IsPrime64 checks if an int64 is prime
func IsPrime64(n int64) bool {
	if n == 1 {
		return false
	}
	for b := SqrtInt64(n); b >= 1; b-- {
		if b == 1 {
			return true
		}
		if n%b == 0 {
			return false
		}
	}
	return true
}
func IsPrime64 ( n int64 ) bool { if n == 1 { return false } for b := SqrtInt64 ( n ) ; b >= 1 ; b -- { if b == 1 { return true } if n % b == 0 { return false } } return true }
IsPrime64 checks if an int64 is prime
IsPrime64 checks if an int64 is prime