1381381

Properties

Appears in sequences

• 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=20A232066
• Primes p at which phi(p-1)/(p-1) reaches a new minimum, where phi is Euler's totient function.at n=10A241196
• Prime numbersat n=105789