? 67*397
 = 26599  \\ composite

? f3=x^3+2*x+1559; n=26599; alpha1=Mod(Mod(x,f3),n); alpha2=alpha1^n; alpha3=alpha2^n; tr=alpha1+alpha2+alpha3; print(tr)
Mod(Mod(0, 26599), x^3 + 2*x + 1559)  \\ zero. 26599 behaving like a prime: mystery
#Mathematics
#Mathematics