Final answer:
The Great Sanhedrin had 71 members. Lesser Sanhedrins in towns had 23 members, which implies 23 people in a lesser Sanhedrin were not a part of the Great Sanhedrin, assuming no overlap of members.
Step-by-step explanation:
The Sanhedrin was an assembly of Jewish religious leaders who functioned as a supreme council and tribunal in ancient Israel. The question appears to ask about members of potentially smaller Sanhedrins compared to the Great Sanhedrin. However, historically there was one main Great Sanhedrin which met in the Temple in Jerusalem and consisted of 71 members, including the High Priest. The Great Sanhedrin was the central body, while smaller councils (lesser sanhedrins) across towns consisted of 23 members. These lesser Sanhedrins dealt with less important matters. Thus, the number of people in a smaller Sanhedrin that would not have been in the Great Sanhedrin would be the total members minus any overlap of members that served on both, if any, which is not typically part of the historical record.