292968749domain: NPropertiesPrimalityPrimeyesAppears in sequencesSmallest prime p such that 5^n divides p^4 - 1.at n=10A125610Smallest odd prime base q such that p^11 divides q^(p-1) - 1, where p = prime(n).at n=2A133861a(n) = 6*5^n-1.at n=11A198764Primes of the form m = 5^i + 5^j - 1, where i > j >= 0.at n=15A239715Prime numbersat n=15891928