If you use Math::GMP, there's gmp_tstbit

Yes, I'd be using the gmp library (accessed either via Math::GMPz or Math::GMP).

Math::BigInt doesn't seem to have an efficient way to fetch a particular bit

Math::BigInt works with base 10 representations of numbers, which makes it less than ideal for determining values of particular bits.

Cheers,
Rob

In reply to Re^2: Turning very larger numbers into an array of bits by syphilis
in thread Turning very larger numbers into an array of bits by gblack

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