377982107

Properties

Appears in sequences

• a(n) is the least prime of class n-, according to the Erdős-Selfridge classification of primes.at n=13A056637
• Let f(p) = greatest prime divisor of p-1. Sequence gives smallest prime which takes at least n steps to reach 2 when f is iterated.at n=14A082449
• a(n) = n-th prime of class 14- according to the Erdős-Selfridge classification.at n=0A129248
• Smallest k such that 3^^n is not congruent to 3^^(n-1) mod k, where 3^^n denotes the power tower 3^3^...^3 (in which 3 appears n times).at n=14A246491
• Smallest k such that 9^^n is not congruent to 9^^(n-1) mod k, where 9^^n denotes the power tower 9^9^...^9 (in which 9 appears n times).at n=13A246497
• Least number that reaches 1 after n iterations of the infinitary totient function A091732.at n=27A333610
• Prime numbersat n=20223077