24504479domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) is the smallest prime of the form k*lcm(1..n) - 1.at n=16A083685a(n) is the smallest prime of the form k*lcm(1..n) - 1.at n=17A083685Primes p for which sigma(p+1)/sigma(p) reaches a record value, where sigma(k) is the divisor sum function (A000203).at n=29A326393Prime numbersat n=1536841