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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) 4159^{2}  1 is one of Ramanujan's highly composite numbers. Note that the famous HardyRamanujan number (1729) is the first four digits of 4159^{2}. [Gupta] The arithmetic mean of the two successive Mersenne primes 2^71 and 2^131. It is the largest known prime with this property. [Earls] The first 4digit prime to occur in the decimal expansion of . [Loungrides]
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