210109

Properties

Appears in sequences

• Number of primes less than 100000n.at n=28A038814
• a(1) = 2; a(n+1) is the smallest prime > a(n) which differs from it in every digit.at n=41A068853
• Largest of seven consecutive primes whose sum of digits is prime.at n=22A106721
• Largest of eight consecutive primes whose sum of digits is prime.at n=9A106724
• Largest of nine consecutive primes the sum of the digits of each of which is prime.at n=2A106725
• a(1) = 1; thereafter a(n) is always the smallest integer > a(n-1) not leading to a contradiction, such that any six consecutive digits in the sequence sum up to a prime.at n=31A152606
• Prime numbersat n=18816