181141

Properties

Appears in sequences

• Smallest weak prime in base n.at n=23A186995
• Primes having only {1, 4, 8} as digits.at n=32A260270
• a(n) = 3*a(n-1) - 3*a(n-2) + 2*a(n-3) - 2*a(n-4) + a(n-5) for n >= 10, a(0) = 2, a(1) = 4, a(2) = 7, a(3) = 12, a(4) = 20, a(5) = 32, a(6) = 50, a(7) = 77, a(8) = 116, a(9) = 174.at n=27A289115
• a(n) is the smallest prime that becomes composite if any single digit of its base-n expansion is changed to a different digit (but not to zero).at n=23A323745
• Smallest weak prime in base 2n+1.at n=11A371475
• a(n) is the smallest prime that becomes composite if any single digit of its base-(2n+1) expansion is changed to a different digit (but not to zero).at n=11A371509
• Prime numbersat n=16424