3991679

Properties

Appears in sequences

• Primes of the form k! + (k+1)! - 1.at n=4A125174
• a(n) = (n! - 10)/10.at n=6A139185
• a(n) = prime(n)!/10 - 1.at n=2A139198
• Primes of the form k!/10 - 1.at n=3A290123
• Lesser of twin primes p for which sigma(p+1)/sigma(p) reaches record value, where sigma(n) is the divisor sum function (A000203).at n=23A326392
• Lesser of twin primes p such that d(p+1) > d(q+1) for all lessers of twin primes q < p, where d(n) is the number of divisors of n (A000005).at n=30A328329
• Prime numbersat n=282606