4990290163

Appears in sequences

• Largest prime factor of Stirling numbers of first kind s(n,2) = A000254(n).at n=27A120299
• Least prime p such that H(n) == 0 (mod p) but H(k) == 0 (mod p) for no 0 < k < n, or 1 if such a prime p does not exist, where H(n) denotes the n-th harmonic number sum_{k=1..n}1/k.at n=28A242223
• Largest prime factor of A001008(n), numerator of n-th harmonic number; a(1) = 1.at n=28A308971