3072-bit key reaches the limit of integer for some cryptosystems

[serengil]

ElGamal

import decimal
# g = random.randint(2, int(math.sqrt(p)))
g = int(random.uniform(2, float(decimal.Decimal(p).sqrt())))

Goldwasser

if (
                pow(xp, int((p - 1) // 2), p) == 1
                and pow(xq, int((q - 1) // 2), q) == 1
            ):

[serengil]

Done in PR - #24