513239

Properties

Appears in sequences

• Table of prime factors of 10^n - 1 (with multiplicity).at n=49A001270
• Largest prime factor of the "repunit" number 11...1 (cf. A002275).at n=9A003020
• Largest prime factor of the "repunit" number 11...1 (cf. A002275).at n=20A003020
• Largest prime factor of 10^n - 1.at n=10A005422
• Largest prime factor of 10^n - 1.at n=21A005422
• Divisors of 10^11 - 1.at n=6A027896
• Triangle of prime numbers in which n-th row lists all primes p such that 1/p has decimal period n, n >= 1.at n=15A046107
• Greatest prime number p(n) with decimal fraction period of length n.at n=10A061075
• Numbers n such that n, 2n+1, 3n+2, 4n+3, 5n+4 are primes.at n=16A067258
• Greatest prime factor of n-th cyclic number.at n=3A087020
• Irregular triangle read by rows in which row n lists prime factors (with multiplicity) of the repunit (10^n - 1)/9 (A002275(n)).at n=28A102380
• Largest prime factor of prime(n)-th repunit number.at n=4A147556
• Numbers n such that n, 2*n+1, 3*n+2, 4*n+3, 5*n+4 and 6*n+7 are primes.at n=4A174591
• Second smallest distinct prime factor of repunit(n) = (10^n-1)/9 (A002275), zero if repunit is prime.at n=9A176973
• Sorted version of A061075.at n=17A181086
• Primes p such that the decimal representation of 1/p does not contain every digit 0-9.at n=34A187614
• Successive prime factors of 10^(10^100) - 10.at n=34A200924
• Irregular triangle read by rows in which row n lists primitive prime factors of the repunit (10^n - 1)/9 (A002275(n)).at n=16A204845
• Irregular triangle read by rows in which row n lists algebraic prime factors of the repunit (10^n - 1)/9 (A002275(n)).at n=54A204846
• Powers of primes other than 2 and 5 in order by cycle length of reciprocal in decimal.at n=18A227969