# 0x21  HD=3  len=57  Example: Len=58 {0} (0x20) (Bits=2)
# 0x21  HD=4  NONE  Example: Len=1 {0} (0x21) (Bits=3)
0x21 {57}
0x21 => factors	x^6+x+1    
	0x21	Prim	x^6+x+1