Answer I Love Lucy was the first show to be re-broadcast as a rerun. Desi Arnaz (Ricky Ricardo character in show) insisted that the show be filmed before the thought of syndication had ever come about.
I Love Lucy was the first sitcom to be filmed in front of live audience. It was not the first series to be filmed. Jackie Gleason's The Life of Riley was filmed in the 1949-50 season. Amos 'n' Andy was filmed and broadcast more than three months before I Love Lucy. Reruns of either could have been broadcast before I Love Lucy aired its first rerun. If "reruns in syndication" was meant then Amos 'n' Andy may have been the first since it was seen first run in syndication in the 1953-55 seasons and may have shown reruns long before I Love Lucy went into syndication in the 1960s. There may have been dramatic series filmed and rerun before I Love Lucy. Real answers aren't always so simple.
The Monkees. :)
I love Lucy was the first show to be taped in front of a live audience
I Love Lucy was the first show sitcom to be taped filmed in front of a live audience.
I Love Lucy was on film, therefore it was filmed. Tape was primitive in the 1950s and generally not used if it even existed at the time of I Love Lucy at all.
Guiding Light is the soap opera with the longest run.
It began on radio in 1937 and made the transition to television in June 1952 until it ended in 2009, a 57 year run on TV (18,262 episodes) & a 15 year run on radio makes a total run of 72 years.
However if you specify television runs, Coronation Street which debuted in December 1960, has matched GL's television run in 2017 with 57 years and will become the longest running next year but still has a ways to go before it matches its total run.