Re: generating a primitive polynom for LFSR



Are these all primitive polynomials?

x^39 + x^25 + x^2 + x + 1
x^39 + x^26 + x^2 + x + 1
x^39 + x^9 + x^3 + x + 1
x^39 + x^34 + x^3 + x + 1
x^39 + x^36 + x^3 + x + 1
x^39 + x^7 + x^4 + x + 1
x^39 + x^18 + x^4 + x + 1
x^39 + x^20 + x^5 + x + 1
x^39 + x^28 + x^5 + x + 1
x^39 + x^31 + x^5 + x + 1
x^39 + x^9 + x^6 + x + 1
x^39 + x^11 + x^7 + x + 1
x^39 + x^19 + x^7 + x + 1
x^39 + x^25 + x^7 + x + 1
x^39 + x^35 + x^7 + x + 1
x^39 + x^23 + x^8 + x + 1

.