65071999

Properties

Appears in sequences

• a(n) is the smallest prime p such that p-1 and p+1 both have n prime factors (with multiplicity).at n=11A154598
• a(n) = smallest number k such that k-1 and k+1 both have exactly n prime divisors (counted with multiplicity).at n=12A154704
• Smallest number m such that both m-1 and m+1 are products of at least n (not necessarily distinct) primes.at n=12A384876
• Prime numbersat n=3844589