The book is now available! 19781
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ The only brilliant number with 3-digit palindromic primes as prime factors, whose the reversal is a 2-sphenic number, (i.e., a number with three 2-digit prime factors): 19781 = 131 * 151, 18791 = 19 * 23 * 43. [Loungrides]

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