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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) 243 is the first number of the form p^{q} where p & q are a prime pair (i.e., where p & q are prime and q = p + 2). [Hunter] 243 = 3^5 is the sum of three first palindromic primes: 11, 101 and 131. [Gallardo] 243 plus the product of the 243rd Fibonacci number and the 243rd Lucas number is prime. This is the largest such number less than a thousand. [Opao] Smallest odd prime to an odd prime power, which is a sum of distinct primorials: 243 = 4# + 3# + 1# + 0# = 210+30+2+1 = 3^5. [Post]
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