169553

Properties

Appears in sequences

• a(n) = largest prime factor of 7^n-1.at n=15A074249
• Primes which are -1 mod m, where m is the index of the prime in sequence A002313 (Real primes with corresponding complex primes). The index m can be found in A084164 Primes which are 1 mod m can be found in sequence A084165.at n=11A084163
• Largest prime factor of 7^n + 1.at n=8A227575
• Greatest prime factor of n^8+1.at n=6A240551
• Odd prime factors of generalized Fermat numbers of the form 7^(2^m) + 1 with m >= 0.at n=12A273948
• Prime numbersat n=15457