r= x^44 + x^43 - x^41 - x^40 + x^38 + x^37 - x^35 - x^34 + x^32 + x^31 - x^29 - x^28 + x^26 + x^25 - x^23 - x^22 - x^21 + x^19 + x^18 - x^16 - x^15 + x^13 + x^12 - x^10 - x^9 + x^7 + x^6 - x^4 - x^3 + x + 1 q= (x^48 - x^47 + x^46 - x^25 + 4*x^24 - x^23 + x^2 - x + 1)/3 P= 3*q_k23method66 v= x