999999999989
domain: N
Appears in sequences
- Largest n-digit prime.at n=11A003618
- Largest n-digit prime with maximum digit sum.at n=11A069662
- Largest n-digit member of A087593. Define dd(k) = the number formed by concatenating the absolute difference of successive digits of k. Sequence contains largest n-digit prime p such that dd(p) is also prime.at n=10A087596
- Smallest and largest primes pairwise displayed with k digits from k=2,3,... with repeated decimal digits.at n=21A099630
- Smallest and largest of the n-digit primes.at n=23A101592
- Largest n-digit zeroless prime with nonprime digits.at n=10A103545
- Prime nearest to 10^n. In case of a tie, choose the smaller.at n=12A115062
- Greatest hypotenuse of primitive Pythagorean triangle not exceeding 10^n.at n=11A117341
- Largest prime <= square root of 10^n.at n=23A132153
- Last prime subtrahend at 10^n in A146757.at n=11A146758
- Last prime subtrahend at 10^n in A146759.at n=11A146760
- Fourth root of largest n-digit number with exactly five divisors.at n=46A174394
- Largest n-digit prime with the most digits equal to 9.at n=11A178007
- Greatest n-digit prime having at least n-1 identical digits.at n=11A241206
- Largest n-digit prime whose digit sum is also prime.at n=11A249448
- Near-repdigit primes with only digits 9 and a single 8 in decimal expansion.at n=15A263431
- a(n) is the largest prime < 10^n that is the sum of at least two consecutive primes.at n=11A342443