[issue3439] math.frexp and obtaining the bit size of a large integer

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

To add support to the proposal: there is currently yet another thread on
c.l.p on how to calculate numbits efficiently.  The OP needs it for
prototyping cryptographic algorithms and found Python-level code slower
than he wanted.

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nosy: +tjreedy

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