Do you get any hints for 64bits when you run perl -V? I am using Strawberry 5.16.3 64bit on Win7 and I get the following: 

print unpack( "b64", pack( "Q",   4_294_967_295)), "\n";
print unpack( "b64", pack( "Q", 126_294_967_295)), "\n";

Result:
1111111111111111111111111111111100000000000000000000000000000000
1111111111000010001000111110011010111000000000000000000000000000

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In reply to Re: Convert unsigned long int (64bit) to binary string(64bits) by hdb
in thread Convert unsigned long int (64bit) to binary string(64bits) by Ergometer

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