Where are your big numbers coming from? If you're manipulating them at all, you probably need a multiple-precision math library. If you use Math::GMP, there's gmp_tstbit. (Math::BigInt doesn't seem to have an efficient way to fetch a particular bit.)

In reply to Re: Turning very larger numbers into an array of bits by Anonymous Monk
in thread Turning very larger numbers into an array of bits by gblack

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