999907domain: NPropertiesPrimalityPrimeyesAppears in sequencesLargest n-digit member of A087593. Define dd(k) = the number formed by concatenating the absolute difference of successive digits of k. Sequence contains largest n-digit prime p such that dd(p) is also prime.at n=4A087596Largest n-digit base-10 deletable prime.at n=5A125590Prime numbersat n=78491