Returns the number of bits in the minimal two's-complement
representation of this BigInteger, <em>excluding</em> a sign bit.
For positive BigIntegers, this is equivalent to the number of bits in
the ordinary binary representation. (Computes
{@code (ceil(log2(this < 0 ? -this : this+1)))}.)
@return number of bits in the minimal two's-complement
representation of this BigInteger, <em>excluding</em> a sign bit.
Returns the number of bits in the minimal two's-complement representation of this BigInteger, <em>excluding</em> a sign bit. For positive BigIntegers, this is equivalent to the number of bits in the ordinary binary representation. (Computes {@code (ceil(log2(this < 0 ? -this : this+1)))}.)
@return number of bits in the minimal two's-complement representation of this BigInteger, <em>excluding</em> a sign bit.