535571domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers k such that (31^k - 1)/30 is prime.at n=7A128002Primes that are the sum of 401 consecutive primes.at n=1A215999Primes formed by inserting a semiprime between the semiprime's ordered factors.at n=23A229480Prime numbersat n=44236