71111111

Properties

Appears in sequences

• Primes of the form n (written in base 10) followed by n 1's.at n=3A070220
• n followed by n 1's.at n=6A075858
• Primes of the form identical digits preceded by a 7.at n=9A090155
• Primes of the form 7*10^k + R_k, where R_k is the repunit (A002275) of length k.at n=2A093632
• Primes with digital product = 7.at n=12A107693
• Smallest prime of the form 7 followed by j copies of the digit k, where j runs through those positive values for which such a prime exists.at n=5A112750
• Chen primes for which the product of the digits is also a Chen prime.at n=27A118722
• Largest n digit prime with the most digits equal to 1.at n=7A177999
• Emirps whose products of digits are prime.at n=15A210546
• Larger of emirp pairs whose members have prime digital products.at n=7A210548
• Largest n digit prime having at least n-1 digits equal to 1.at n=7A268702
• Largest positive number using exactly n segments on a calculator display (when '6' and '7' are represented using 6 resp. 3 segments).at n=15A337099
• Lesser of two consecutive primes such that the product of its digits is also prime and the sum of the digits of the other is composite.at n=14A370848
• Lesser of two consecutive primes such that the product of its digits is also prime and that of the other is composite.at n=35A370851
• Prime numbersat n=4179535