1621621

Properties

Appears in sequences

• Linking prime for the first and second member of maximal chains of primes that have at least three members.at n=21A145650
• Periodic primes: primes p whose decimal expansion can be written as sss...st, where s is nonempty string of digits not beginning with 0, there are at least two copies of s, and t (which may be absent) is a prefix of s.at n=28A232066
• Row 3 of A328464: a(n) = A276156(8n - 4) / 6.at n=40A328466
• Prime numbersat n=122654