Table 5: Minimum length of pLFSR to guarantee a given min key length.

for key length
512 bits1024 bits

25121024
3256512
5, 7171342
11, 13128256
17, 19, 23, 29, 31103205
37, 41, 43, 47, 53, 59, 6186171
67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 12774147
131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 25164128