The book is now available! 189941761
(another Prime Pages' Curiosity)
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+ If n = 0, 1, 2 or 3, then 1458752724480*n + 189941761 is a base-7 pseudoprime. Note that 189941761 and 1458752724480*3 + 189941761 are Carmichael numbers. [Wesolowski]

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