I don't think we can give a solid answer without knowing better what @p contains. If @p is empty or is a new variable ("use strict"), then the first time through the loop while ( $x % $p[$i] != 0 ) could report a "use of undefined in modulus" because $p[$i] is undefined.

-xdg

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In reply to Re: Modulus zero error by xdg
in thread Modulus zero error by Anonymous Monk

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