C:\_32>perl -MMath::MPFR=":mpfr" -le "Rmpfr_set_default_prec(1024001);$x = Math::MPFR->new(2); $x **= 1024000; print $x;" >out.txt

##</code><code>##

5.194693363199925.....490149376e308254

##</code><code>##

perl -MMath::MPFR=:mpfr -le "Rmpfr_set_default_prec(28);print Math::MPFR->new(2) ** 1024000;"
5.194693363e308254