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 Maybe  is correct. The runlength (or pattern length) of a 6-bit LFSR should be  rather than . 

 "In one period of a maximal LFSR,  runs occurs (for example, a six bit LFSR will have 63 runs)." 

 I suggest introducing hyphenation for clarity: 

 "In one period of a maximal LFSR,  runs occurs (for example, a six-bit LFSR will have 63 runs). Exactly  of these runs will be one-bit long,  will be two-bit long, up to a single run of zeroes ()-bit long, and a single run of ones -bit long." 
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