In the
Puzzle 900 Sebastián
Martín Ruiz posed an question:
Why the numerator of the reduced quotient concerning to the
product expression
{Π[((pi)^2+1)/(pi-1)]} from i=1 to n,
always end in "25" for n>2?
Emmanuel Vantieghem worked on this question and at the end he
qualified it as a "conjecture" because he explained some cases,
he failed to find a complete proof.
Q. Can you obtain a
complete proof for the question-conjecture by Sebastian Martín
Ruiz or find a counterexample?
