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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ A number is said to be square-full if for every prime, p, that divides it, p2 also divides it. 196 is such a number.

+ The smallest possible Lychrel number. Note that the iterative process of repeatedly reversing its digits and adding the resulting numbers produces a prime Lychrel number on the first step. [Ray]




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