181439

Properties

Appears in sequences

• Primes in the progression (n!- m)/m where n advances by 1 and m resets to 1 upon each prime occurrence.at n=6A089137
• Largest prime of the form n!/k!-1.at n=6A093622
• a(n) = n!/2 - 1.at n=7A139172
• a(n) is the number of numbers removed in each step of Eratosthenes's sieve for 9!.at n=0A145536
• Primes which produce records in A157188, at index i=pi(a(n)) (pi=A000720).at n=9A157190
• a(n) is the smallest prime such that exactly n prime pairs (p,q) exist with a(n) = p * q + p + q.at n=14A198277
• Primes of the form 7n^2 - 8.at n=20A201853
• Primes of the form k! / 2 - 1.at n=4A290116
• Numbers k such that 441*2^k+1 is prime.at n=43A323149
• The least prime p such that equation x = p*sopf(x) (where sopf(x) is the sum of distinct prime factors of x) has exactly n solutions in positive integers.at n=13A336296
• a(n) is the least prime p such that there are exactly n pairs of primes (q,r) with p > q > r such that q | r + p and r | q + p.at n=15A344776
• Prime numbersat n=16447