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$ ./perl -I./lib -le 'printf "%.751g\n", 2 ** - 1074;' 4.94065... another 740 digits ...65625e-324
$ perl -le 'printf "%.91g\n", 2 ** -1074;' 4.9406564584124654e-324 $ perl -le 'printf "%.92g\n", 2 ** -1074;' 4.94065645841246544176568792868221372365059802614324764425585682500675 +50727020875186529983636e-324