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399337 = 616² + 141²
399337 = 464² + 429²

Based on the above results find the two prime factors of 399337.

Let f(x) be a polynomial. It is known that for all x,

f(x)f(2x²) = f(2x³+x)

If f(0)=1 and f(1)+f(2)=f(3), find f(5).

What task is “mission impossible” for nine competent rabbis yet poses no problem to be accomplished by ten ignorant Jewish unschooled adults?