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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) If we reverse the prime 52609 and square (90625^{2} = 8212890625), the last five digits are 52609 reversed. Note that 8212890625^{2} = 67451572418212890625 ends in 8212890625, while 5260982128142751547 (its reversal without the 6 on the end) is prime! [Kulsha]
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