100999

Properties

Appears in sequences

• Primes of the form 10^n + 10^(n-2) - 1.at n=2A096210
• Denominator of the continued fraction convergents of the decimal concatenation of the powers of 10.at n=6A128876
• Primes in A182040.at n=10A182092
• Primes that end in 999.at n=21A230202
• Primes of the form m = 10^i + 10^j - 1, where i > j >= 0.at n=4A239720
• 8-digit numbers (padded with leading zeros where necessary) in which the sum of the number consisting of the first four digits and the number consisting of the last four digits equals the number consisting of the middle four digits.at n=19A293686
• Primes of the form 10^i + 10^j - 1.at n=7A306855
• a(n) is the n-digit number k such that R(k)/k is maximal for any n-digit number.at n=5A372010
• Prime numbersat n=9673