300690389domain: NPropertiesPrimalityPrimeyesAppears in sequencesSmallest prime p such that p+1 is the product of exactly n distinct prime numbers.at n=8A098026a(n) is the first prime p for which the absolute value of the difference between the numbers of distinct prime factors of p+1 and p-1 is exactly n.at n=7A353123Prime numbersat n=16287712