Quote:
Originally Posted by R. Gerbicz
There was also an error in N:
N=2,1526L/2,218L=2^654+2^600+2^5452^4362^3822^3272^2732^218+2^109+2^55+1
I think the correct polynom ( I've found this by hand ) is the following: (checking this by PariGp ):
(23:15) gp > f(x)=x^6+2*x^510*x^420*x^3+16*x^2+32*x+8
(23:15) gp > g(z)=substpol(f(x),x,2*z+1/z)
%4 = (64*z^12 + 64*z^11 + 32*z^10  16*z^8  16*z^7  8*z^6  8*z^5  4*z^4 + 2*z^2 + 2*z + 1)/z^6
(23:15) gp >
Further checking to see that g(z) has a root of 2^54 modulo N:
(23:28) gp > lift(g(Mod(2^54,N)))
%13 = 0
(23:28) gp >

I got the coefficient of x wrong, and that led to an incorrect constant as
well
Thanks.