2028119

Properties

Appears in sequences

• Smallest number with reciprocal of period length n in decimal (base 10).at n=37A003060
• Smallest primitive factor of 10^n - 1. Also smallest prime p such that 1/p has repeating decimal expansion of period n.at n=36A007138
• Prime divisors of solutions to 10^n == 1 (mod n).at n=39A066364
• Smallest prime factor of repunit(n) = (10^n-1)/9 (A002275).at n=35A067063
• Smallest prime factor of prime(n)-th repunit number.at n=11A147555
• Smallest prime factor of f(n) = 10^(2*n+1) + (10^n-1)/9.at n=36A365966
• a(n) is the least prime factor > 3 of 10^n - 1.at n=35A366921
• Smallest prime factor that the repunit(n) = (10^n-1)/9 shares with at least one other binary vector of the same length in base 10, or 1 if they are coprime.at n=37A385579
• Prime numbersat n=150886