2097211

Properties

Appears in sequences

• a(n) = 2^(n+1) - 1 + 3*n.at n=20A131833
• Second smallest prime after 2^n.at n=21A187872
• Minimal number (in decimal representation) with n nonprime substrings in base-8 representation (substrings with leading zeros are considered to be nonprime).at n=31A217108
• a(n) is the smallest prime greater than 2^n such that 2 is a primitive root modulo a(n).at n=21A250396
• Prime numbersat n=155613