r= x^20 + x^19 - x^17 - x^16 + x^14 + x^13 - x^11 - x^10 - x^9 + x^7 + x^6 - x^4 - x^3 + x + 1 q= (x^24 - x^23 + x^22 - x^13 + 4*x^12 - x^11 + x^2 -x + 1) / 3 P= 3*q_k11method66 v= x