An 81-year-old US woman, who slept with her winning lottery ticket in a Bible, has claimed a $US336.4 million PowerBall prize, one of the largest jackpots in the United States, lottery officials said. Louise White kept her identity secret for weeks after buying the lucky ticket at a grocery store in Newport, Rhode Island, when a family member wanted some rainbow sherbet dessert. She came forward yesterday and took the prize in one lump sum payment of $210 million, the highest cash jackpot ever, lottery officials said. "I'm very happy and I'm very proud and this will make my family very happy. We are truly blessed," White, a Newport resident, said during a brief appearance at a news conference.