=head1 NAME
-BN_zero, BN_one, BN_set_word, BN_get_word - BIGNUM assignment operations
+BN_zero, BN_one, BN_value_one, BN_set_word, BN_get_word - BIGNUM assignment
+operations
=head1 SYNOPSIS
Someone might change the constant.
+If a B<BIGNUM> is equal to 0xffffffffL it can be represented as an
+unsigned long but this value is also returned on error.
+
=head1 SEE ALSO
L<bn(3)|bn(3)>, L<BN_bn2bin(3)|BN_bn2bin(3)>