It has only been 188 days since the launch of Halo 5 and the first person has reached the maximum spartan rank of 152. To get to rank 152 you must obtain 50 million xp PURSUANTRUMBLEX has achieved this in a total play time of 59 days and 4 hours with 9120 games played.
The below list shows the steps up in xp you need to get from SR 145 to SR 152.
145 - 7,750,000 - SR 145 Pack, containing Kindred Emblem
146 - 9,000,000 - SR 146 Pack, containing Cognate Emblem
147 - 11,050,000 - SR 147 Pack, containing Slumber Emblem
148 - 14,000,000 - SR 148 Pack, containing Awake Emblem
149 - 18,000,000 - SR 149 Pack, containing Sentient Emblem
150 - 24,000,000 - SR 150 Pack, containing Warden Emblem
151 - 35,000,000 - SR 151 Pack, containing Guardian Emblem
152 - 50,000,000 - SR 152 Pack, containing Mantle Emblem
