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The start of a curious sequence of circulardigit primes. The terms consist of primes of the form 609 * 10^{n}  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 circulardigit prime that contains all circular digits. [Loungrides]
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