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DES MOINES, Iowa (AP) - Powerball officials say the jackpot has climbed to an estimated $600 million, making it the largest prize in the game's history and the world's second largest lottery prize.

Lottery officials say the prize is growing quickly Friday because so many people have been purchasing the $2 tickets. The jackpot has grown by an estimated $236 million since the last drawing on Wednesday.

The last jackpot was won on March 30, so it's been growing for about six weeks. The next drawing is Saturday night.

The largest jackpot ever was a $656 million Mega Millions prize won in March 2012. The prize was split three ways with winners in Illinois, Kansas and Maryland.

Odds of winning the Powerball jackpot are about 1 in 175 million.

A local non-profit needs your help to assemble a tribute to a jewel of St. Louis. 

Thursday marked the 50,000th day since Forest Park was opened. To commemorate the anniversary, Forest Park Forever wants to collect 50,000 memories of the park.

Lesley Hoffarth, President of Forest Park Forever, invites residents to share their memories in person, or online through Twitter, Facebook, or email. Memories can be dropped off with a picture at the Forest Park Visitor Center Monday - Friday between 6 AM and 8 PM. On Twitter and Instagram users should use #FPF50K to mark their memories. Or they can be added to the group's Facebook page.

She also says there are plans underway to improve the park, including one project that should be popular, "We are going to update the signs!" She adds, "It is the number one complaint we get from people, that they can't find their way around.' The signs were designed in coordination with all of the different attractions in the park. In addition to signs placed near roads, there will also be signs along the walking paths throughout the park. They will give directions and approximate walking times to the attractions throughout the park. Work on the new signs will start this fall and should wrap up by the spring.

KTRS's own McGraw Milhaven shared his memory of the park, "My favorite memory of Forest Park is going to be the next time I visit, because every time I'm there I fall in love with it."

JEFFERSON CITY, Mo. (AP) - Missouri prosecutors want a judge to let them keep closer tabs on the former head of a failed artificial sweetener plant in Moberly.

Attorney General Chris Koster's office said Thursday it has filed a motion in St. Charles County Circuit Court seeking to monitor ex-Mamtek CEO Bruce Cole with a wearable GPS device.

Cole is under house arrest in his home state of California awaiting a Missouri trial on felony fraud and forgery charges. His bond was reduced from $500,000 to $100,000 in March.

The Mamtek project was financed with $39 million in bonds issued by the city of Moberly's Industrial Development Authority. The project collapsed after Cole's company missed a bond payment in August 2011.

A hearing is scheduled Monday on a change of venue from Randolph County.