Code :
Number = int(input("Enter a number to check: "))

if Number > 1:
    for i in range(2,Number):
        if (Number % i) == 0:
            print("Not a prime number.")
            break
    else:
        print("Prime number.")
else:
    print("Not a prime number.")
Output :
Enter a number to check: 57
Not a prime number.

IDE Used To Test This Code : Python IDLE.

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