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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) 81 is the third smallest prime power of a prime power of a prime. [Petersen] 81 is the smallest (and only known) square such that 81*2^811 is prime. [Gupta] 81 = (prime(8)+8) * (prime(1)+1). Note that 81 is the only known number (less than 10000000) with this property. [Firoozbakht] There are 81 Full House primes, with the most advantageous being 18181 and 81181 (where 1 is regarded as the Ace.) [Goelz] The smallest square greater than 1 such that 81^(81+1) + (81+1) is a prime. [Jha]
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