155189249

Properties

Appears in sequences

• Minimal 2^n safe-primes: a(n) = 2^n*A051886(n) + 1 (a prime number).at n=22A051900
• Smallest prime p such that (p-1) has n divisors, or 0 if no such prime exists.at n=45A066814
• Duplicate of A051900.at n=22A084706
• Least prime of the form 1 + p*2^n, where p is an odd prime.at n=21A134854
• a(n) = smallest prime p such that p-1 and p+1 together have n prime divisors, or a(n) = 0 if no such prime exists.at n=31A155800
• Odd prime factors of generalized Fermat numbers of the form 3^(2^m) + 1 with m >= 0.at n=15A273945
• a(n) is the smallest prime p such that p - 1 has 2*n divisors.at n=22A340870
• Prime numbersat n=8719625