Failing to change bool var state in loop

I'm trying to write a prime number checker according to : Prime equations

My code so far looks like this:

def primer(x):

    prime = False
    x = math.sqrt(x)
    if type(x) == float:
        x = math.ceil(x)

    for i in range(3,x + 1):
        if (i % 2) == 1:
            prime == True
    print(prime)

Trying with 37 as primer(37) ---> sqrt(37) is 6.08

rounded to 7

7 mod 3 is = 1 ( Prime number )

I have no clue with that prime var is not updating. Could someone shed a light please ?

Edit : Linking some repl -> Repl Link