78277

Properties

Appears in sequences

• Primes of the form x^2 + 17*y^2, where x and y=x+1 are consecutive natural numbers.at n=11A176622
• Initial member of 6 consecutive primes a, b, c, d, e, f such that both (f + a)/(d - c) and (e + b)/(d - c) are prime.at n=33A293619
• a(n) = minimal positive k such that the concatenation of the decimal digits of n,n+1,...,n+k is divisible by n+k+1, or -1 if no such k exists.at n=38A332580
• Primes having only {2, 7, 8} as digits.at n=28A385789
• Prime numbersat n=7686