or download this
C:\Windows\System32>perl -MPOSIX -e "printf '%.0f', POSIX::DBL_MAX;"
1797693134862315700000000000000000000000000000000000000000000000000000
+000000000000000000000000000000000000000000000000000000000000000000000
+000000000000000000000000000000000000000000000000000000000000000000000
+000000000000000000000000000000000000000000000000000000000000000000000
+00000000000000000000000000000000