998717

Properties

Appears in sequences

• Largest n-digit prime whose external digits as well as internal digits form a prime, or 0 if no such number exists.at n=5A077362
• a(n) is the greatest prime > a(n-1) obtained by inserting a single digit anywhere in its string of digits (including at the beginning or end), starting with a(1) = 1.at n=5A389721
• Prime numbersat n=78410