BrowserUk,
I used Math::BigInt without testing if it is necessary because 2 ** 60 + 2 ** 30 seemed big.

The point of my post was that if you know you are summing 1 .. N then don't - use the formula. Programmer knowledge of the specific problem beats a generalization.

Cheers - L~R

In reply to Re^5: &1 is no faster than %2 when checking for oddness. Oh well. by Limbic~Region
in thread &1 is no faster than %2 when checking for oddness. Oh well. by diotalevi

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