The Higgs boson may not be the heaviest particle created by man so far (it is exceeded by the top quark), but it may be the highest dimension particle created by man so far. If calculations are correct, it may be of dimension 20/21 (the top quark is dimension 9/10), that is, it may be composed of 20-dimensional matter (quarks) circulating in the surface of a 21-sphere. Recent Higgs boson mass measurements of high accuracy, and a mass factoring technique based on n-sphere surface volumes, which was derived from Planck's Energy-Frequency Relation, E=hf, were used to reach that conclusion. A power of two factoring, which is a possible indication of stability, was found within 3 MeV of the ATLAS group's recent 125,220 MeV improved accuracy measurement of the Higgs's mass. The S21h power of two factoring found, (2^16 - 2^10)S21h, translates to a mass of 125,217.08 MeV, which is very close to the ATLAS group's result. Is the Higgs boson made of 20/21-dimensional matter?