Sir, I submitted the code with the following program:
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
	if(isprime(n))
		System.out.println("Prime");
	else
		System.out.println("Not Prime");
	//sc.close();
}
private static boolean isprime(int n) {
	if(n==1)
		return false;
	for(int i=2;i*i<=n;i++) {
		if(n%i==0)
			return false;
	}
	return true;
}
but still, I got 75 points although all test cases give the correct answer
