Are your numbers over 2 billion? %d uses a signed native integer, usually 32 bit of 64 bit in size. Use %.0f instead. 
$ perl -E'printf "%d\n", 2**34'
-1

$ perl -E'printf "%.0f\n", 2**34'
17179869184

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In reply to Re: math problems by ikegami
in thread math problems by mmittiga17

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