The book is now available! 75361
(just those submitted by Carmichael)
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Just showing those entries submitted by 'Carmichael': (Click here to show all)

+ 75361 = 11 * 13 * 17 * 31 is the first 4-brilliant Carmichael number. Note that both its digital sum and reversal are semiprime. [Carmichael]




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