321272407

Properties

Appears in sequences

• a(n) = 1111111 in base n.at n=25A053716
• Smallest prime of the form (n^k-1)/(n-1), or 0 if no such prime exists.at n=24A084738
• Primes of the form n^6 + n^5 + n^4 + n^3 + n^2 + n + 1.at n=8A088550
• Legal generalized repunit prime numbers.at n=25A179625
• Primes of the form k^6 + k^5 + k^4 + k^3 + k^2 + k + 1 where k is nonprime.at n=3A194194
• a(n) = (26^n - 1)/25.at n=7A218729
• Primitive prime factors of the cyclotomic polynomial sequence Phi(7,k) in the order in which they occur.at n=31A256146
• Prime numbersat n=17340219