Don't forget the early congregations:
There were "many in Joppa" (Acts 9:42),
"a great number from Antioch" (Acts 11:21),
"a great multitude in Iconium" (Acts 14:1),
"quite a few in Derbe" (Acts 14:21),
"a great multitude" in Thessalonica (Acts 17:4),
"Many" in Beroea (Acts 17:12),
"Jews and Greeks" in Corinth (Acts 18:4), and
"many thousands (literally 'myriads' - 10,000's) of converted Jews" (Acts 21:20).