C:\test>\perl5.18\perl\bin\perl.exe -E"printf qq[%u\n], 2**63"
9223372036854775808

##</code><code>##

C:\test>\perl5.18\perl\bin\perl.exe -E"1 for 1 .. 9223372036854775808"
Range iterator outside integer range at -e line 1.

##</code><code>##

C:\test>\perl5.18\perl\bin\perl.exe -E"1 for 1 .. 9223372036854775808 - 1"

##</code><code>##

C:\test>\perl5.18\perl\bin\perl.exe -E"1 for 1 .. 2**63 - 1"
Range iterator outside integer range at -e line 1.

##</code><code>##

C:\test>\perl5.18\perl\bin\perl.exe -E"1 for 1 .. 2**63 - 512"
Range iterator outside integer range at -e line 1.

##</code><code>##

C:\test>\perl5.18\perl\bin\perl.exe -E"1 for 1 .. 2**63-513"