34559999domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) is smallest prime such that a(n)+1 is a proper multiple of a(n-1)+1 [with a(1)=1].at n=13A058000Primes arising in A084402. a(n) = n-th partial product of A084402 - 1.at n=13A084403Prime numbersat n=2121490