71399

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of the function f(x) = 2*x + 1.at n=31A023272
• Primes starting a Cunningham chain of the first kind of length 4.at n=21A059763
• Balanced primes of order eleven.at n=27A096703
• Primes of the form 4*k-1 such that 8*k-1, 16*k-1 and 32*k-1 are also primes.at n=10A101795
• Primes p such that p's set of distinct digits is {1,3,7,9}.at n=34A108386
• Numbers k such that k^j + (k+1)^j is prime for j = 1, 2, 4, 8.at n=4A127206
• Emirps using each of the digits 1, 3, 7, 9 at least once, but no others.at n=13A158917
• G.f.: exp( Sum_{n>=1} A168591(n)*x^n/n ), where A168591(n) = sum of the n-th power of the trinomial coefficients in row n of triangle A027907.at n=4A168590
• Primes that are the sum of all composite numbers in-between prime numbers p(n) and p(n+2).at n=35A174521
• Primes of the form 7n^2 - 8.at n=13A201853
• Numerators of upper primes-only best approximates (POBAs) to Pi; see Comments.at n=18A265810
• Position of start of first occurrence of palindromic prime(n) after the decimal point in expansion of Pi.at n=37A309343
• Prime numbersat n=7071