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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) The smallest palindromic prime greater than 131 formed by alternating 1 and 3. It has a square number of digits (25) and its sum of digits is also a square number (49). [Gallardo] A prime formed by concatenating thirteen 13's and deleting the last digit. [Avrutin]
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