Prime Substrings by oerjan

m@main=getLine>>=putStrLn.(>>=(>>=p.read)).scanl1(zipWith(++)).scanr((:).(:[]))[]>>m
p x=show$product[2..x-2]^2`mod`max 1x

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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