61409

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of the function f(x) = 2*x + 1.at n=28A023272
• Primes that remain prime through 4 iterations of function f(x) = 2x + 1.at n=5A023302
• Initial (unsafe) primes of Cunningham chains of first type with length exactly 5. Primes in A059453 that survive as primes just four "2p+1 iterations", forming chains of exactly 5 terms.at n=3A059764
• Smallest primes starting a complete four iterations Cunningham chain of the first or second kind.at n=8A110027
• Primes that are anagrams of Fibonacci numbers.at n=37A162390
• Primes p such that A008472(p-1) = A008472(p+1), where A008472 = sum of distinct primes dividing n.at n=8A203182
• The number of vertices in a Farey diagram of order (n,n).at n=7A358883
• Prime numbersat n=6178