or download this
# 53 bit precision, rounding to nearest
C:\>perl -MMath::MPFR -le "print exp(Math::MPFR->new('15863.8668285308
+'))"
...
# 113 bit precision, rounding to nearest
C:\>perl -MMath::MPFR=":mpfr" -le "Rmpfr_set_default_prec(113);print e
+xp(Math::MPFR->new('15863.8668285308'))"
3.88888659703546395686515111487812115e6889