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Maple 12 fails to factor this polynomial factor(x^8-8*x^7-20*x^6+232*x^5+126*x^4-2200*x^3-836*x^2+6776*x+4403); Because I knew the zeros +/-sqrt(2)+/-sqrt(3)+/-sqrt(6) I could factor it myself. One factor is x^4-22*x^2-48*x-23 Just what are the limitations of factor? I saw no hint on the help pages? At what degree does it start to fail? Surely it can handle degree 3 always--but I guess not 8. So where does it start to give up without warning (as above). Is there a built in test for irredicibility (since factor can not be used as one)?

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