How to generate a "big" random number in Python?

Question

How can I generate a big (more than 64 bits) random integer in Python?

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Answer 1

You can use random.getrandbits():

>>> random.getrandbits(128)
117169677822943856980673695456521126221L

As stated in the linked documentation, random.randrange() will also do the trick if random.getrandbits() is available.

Answered By: Sven Marnach

Answer 2

You can also use this function to generate a number of any length.

def generateRandomNumber(digits):
    finalNumber = ""
    for i in range(digits // 16):
        finalNumber = finalNumber + str(math.floor(random.random() * 10000000000000000))
    finalNumber = finalNumber + str(math.floor(random.random() * (10 ** (digits % 16))))
    return int(finalNumber)

Answered By: OhhhThatVarun

How to generate a "big" random number in Python?

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