777767777

Properties

Appears in sequences

• Smallest prime beginning and ending in at least n 7's.at n=3A068162
• Palindromic wing primes (a.k.a. near-repdigit palindromic primes) of the general form r*(10^d - 1)/9 + (m-r)*10^floor(d/2) where d is the number of digits (an odd number > 1), r is the repeated digit, and m (different from r) is the middle digit.at n=30A077798
• Smallest palindromic prime containing exactly n 7's.at n=7A083978
• Palindromic primes in which a single digit is sandwiched between strings of 7's.at n=10A088283
• Smallest prime obtained by sandwiching n between a number with identical digits, or 0 if no such prime exists. Primes of the form k n k where all the digits of k are identical.at n=6A090287
• Palindromic wing primes that are also Lychrel candidates.at n=1A320516
• a(n) = 7*(10^(2*n+1) - 1)/9 - 10^n.at n=4A332176
• Prime numbersat n=40060560