137131

Properties

Appears in sequences

• List of pairs of primes in reverse order, starting at 1.at n=16A007796
• Primes formed by concatenating a prime with the preceding prime.at n=4A088784
• Consecutive prime pairs which after concatenation are prime (ascending or descending order).at n=7A133986
• Primes n of the form 1000p+q with primes p and q, 998>p>q>100.at n=5A228268
• a(1) = 1, a(2) = 2; for n >= 3, a(n) = least number not included earlier that divides the concatenation of all previous terms.at n=6A240588
• Primes formed from concatenating nextprime(n) and n.at n=13A280357
• Primes formed from the concatenation of n and previousprime(n).at n=35A280388
• Prime numbersat n=12768