3111131

Properties

Appears in sequences

• Primes with digital product = 9.at n=16A107695
• Primes whose decimal expansion has the form XYYYX, for nonzero numbers X and Y, where Y is a single digit.at n=26A162423
• a(1)=1; otherwise, find the first digit from the left in a(n-1) which is 1, 3, 7 or 9. Omitting the digits before this one, we reverse the remaining digits, obtaining s, say. Then a(n) is the smallest prime which ends with s and has not already appeared.at n=12A249974
• Prime numbersat n=224245