Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_93 (exponent_field VARCHAR, exp__biased_ VARCHAR, value VARCHAR)

### Question ###
What's the exponent field that has 255 exp and value of +∞?

### Accurate SQL ###

SELECT exponent_field FROM table_name_93 WHERE exp__biased_ = "255" AND value = "+∞"