What's the exponent field that has 255 exp and value of +∞?
CREATE TABLE "examples" (
  "type" text,
  "actual_exponent" text,
  "exp_biased" text,
  "exponent_field" text,
  "significand_fraction_field" text,
  "value" text
);
SELECT "exponent_field" FROM "examples" WHERE "exp_biased"='255' AND "value"='+∞';