Re: how to get the thighest bit position in big integers?

[Holger]

def highest_bit(n, maxbits = 256):
    bit = 0
    while maxbits > 1:
        maxbits >>= 1
        a = n >> maxbits
        if a:
            bit += maxbits
            n = a
    return bit

is sligtly better
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