2894220

Appears in sequences

• a(n) = smallest number k such that rk-1 is prime for all r = 1 to n.at n=6A088651
• a(n) = smallest number k such that rk-1 is prime for all r = 1 to n.at n=7A088651
• a(n) is the smallest number m such that k*m - 1 for k=2,3,...,n is prime.at n=6A125838
• Least k such that x*k - 1 produces primes for x=1..n and composite for x=n+1.at n=7A202779