LF(2^2281-1)-1 = 2 * 2 * 2 * 2 * 2 * 3 * 5 * 19 * 23 * 41 * 57872616793 * 271819582242082307 * 3297516038750209158351848769787405523717142645335063417537342353153 * 114432032892115797882627811961831608965139527430443490158471019890329
where LF(p) = the largest prime factor of p-1
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