The book is now available! 6089
(another Prime Pages' Curiosity)
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+ The start of a curious sequence of circular-digit primes. The terms consist of primes of the form 609 * 10n - 1, for n from 1 to 6. [Earls]

+ The first occurrence of a twin prime pair (6089,6091) that both consist of a nonprime number of nonprime digits only. Note that the larger member is an invertible prime which turned upside down corresponds also to the larger member (1609) of a twin prime pair. [Beedassy]

+ The smallest circular-digit prime that contains all circular digits. [Loungrides]

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