SACRAMENTO (CBS / AP) — At least 770,000 ballots have not yet been counted from California’s primary election.

The secretary of state’s office posted a partial tally Thursday afternoon that shows the totals of outstanding ballots in 24 of California’s 58 counties.

Election officials in every county except Sierra are still processing thousands of ballots that arrived late or need verification. There are 166,000 in Los Angeles County alone.

Turnout from Tuesday’s statewide primary is expected to be the lowest for any regular statewide election in history.

The ballots counted so far put turnout about 18.4 percent, but that will rise as the remaining ballots are counted.

The previous low was 28.2 percent in June 2008, when California separated the presidential primary from the regular ballot.

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