libbit-vector-perl 6.4-7 (i386 binary) in ubuntu intrepid

 Bit::Vector is an efficient C library which allows you to handle
 bit vectors, sets (of integers), "big integer arithmetic" and
 boolean matrices, all of arbitrary sizes.
 .
 The library is efficient (in terms of algorithmical complexity)
 and therefore fast (in terms of execution speed) for instance
 through the widespread use of divide-and-conquer algorithms.
 .
 The package also includes an object-oriented Perl module for
 accessing the C library from Perl, and optionally features
 overloaded operators for maximum ease of use.
 .
 The C library can nevertheless be used stand-alone, without Perl.