25667

Properties

Appears in sequences

• The $620 prime list.at n=12A018188
• Primes of the form (prime(prime(k)) + prime(prime(k+1)))/2.at n=22A098042
• Beginning with 3, least prime such that concatenation of first n terms and its digit reversal both are primes.at n=47A113584
• Smallest odd prime base q such that p^3 divides q^(p-1) - 1, where p = prime(n).at n=35A125637
• Least k > 2 such that (n^k - 1)/(n-1) is prime, or 0 if no such prime exists.at n=16A128164
• Numbers k such that (18^k - 1)/17 is prime.at n=1A133857
• Primes of the form 3*k^2 + 9*k + 5.at n=34A171838
• Number of composite Lucas numbers between the prime Lucas numbers A005479(n) and A005479(n+1).at n=42A245472
• a(n) is the smallest b > 1 such that p = prime(n) satisfies b^(p-1) == 1 (mod p^3).at n=35A249275
• Primes which contain the fax number of the beast (667).at n=6A321001
• Numbers k such that both Sum_{i=1..k} i*prime(i) and Sum_{i=1..k} (k+1-i)*prime(i) are prime.at n=37A356178
• Primes having only {2, 5, 6, 7} as digits.at n=34A386160
• Positions of records in A196047.at n=35A390293
• Prime numbersat n=2827