$ ./perl -I./lib -le 'printf "%.751g\n", 2 ** - 1074;'
4.94065... another 740 digits ...65625e-324

##</code><code>##

$ perl -le 'printf "%.91g\n", 2 ** -1074;'
4.9406564584124654e-324
$ perl -le 'printf "%.92g\n", 2 ** -1074;'
4.9406564584124654417656879286822137236505980261432476442558568250067550727020875186529983636e-324