Lenders in the government's Making Home Affordable program have extended mortgage modifications to more than 650,000 delinquent borrowers since April a fifth of those eligible, the government reported Tuesday.

The number of homeowners who have been offered trial loan modifications has more than doubled since August to 919,965, or 29% of those eligible, the Treasury Department said in its monthly progress report on the program. Homeowners receive modifications if they stay current on their loans for the three-month trial phase.

Treasury did not report how many mortgages have been permanently modified, but a congressional panel's report last month put the number at 1,711 as of Sept. 1.

According to Treasury, California has the most active trial modifications 134,609 followed by Florida at 82,614.

Despite lenders' progress in getting more borrowers into trial modifications, the bulk of homeowners 80% of those estimated to be eligible for help still have not received a modification that could prevent a possible foreclosure.

"(The program) has made tremendous progress," says Faith Schwartz, executive director of Hope Now, an alliance of counselors, mortgage companies, investors and others that helps distressed homeowners. "It's an aggressive program and good for homeowners. The industry is doing everything it can do. That said, there's a tremendous amount of activity that falls outside of (the program), such as other modifications or forbearance plans."

In 2009, loan servicers have offered additional workout solutions through programs other than the government's plan to more than 2.3 million homeowners, according to Hope Now. Those may include loan modifications, repayment plans, principal reductions and forbearance.