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For a program written solely by me, about 80,000. Though I have worked on a team that ranged in size from 20 to 100 (changed as required during lifetime of project) that had over 3 million lines of code in it. I just finished a code backup of the mainframe component and that alone consists of 473,000 lines of code.

Edit: FYI it is actually not a good bragging right to have too much code. We spend far more time tuning and removing code than we do adding code now. My effort for this week so far is the removal of 1800 lines of code  and replacing it with 100 or so lines of efficient code So a net loss of 1700