perl -e 'foreach (1..20) {print rand(2**40)."\n";}'
652134293073.004
1052236192611.47
192842278698.137
607110319202.945
169022882701.082
527530860527.984
927864292758.34
1056669509421.09
334346614774.41
928276890176.75
1007499895313.79
947274310133.477
99715725600.9883
844160053849.766
826658965072.496
492702127712.117
518596741600.816
70972611711.0312
56473002822.4492
357827335249.008