49977801259
domain: N
Appears in sequences
- Largest prime factor of the semiprime 2^A165767(n)-A165767(n).at n=7A165769
- Least prime divisor of 2^n - n which does not divide any 2^k - k with 0 < k < n, or 1 if such a primitive prime divisor of 2^n - n does not exist.at n=38A242292
- Greatest prime dividing 2^n - n for n>=2; a(1) = 1.at n=38A359684