10000079

Properties

Appears in sequences

• Smallest n-digit prime whose external digits as well as internal digits form a prime, or 0 if no such number exists.at n=7A077361
• Array read by rows: row n lists the first two primes with n digits.at n=15A139052
• Array read by rows: row n lists the first 3 primes with n digits.at n=22A139053
• Array read by rows: row n lists the first 4 primes with n digits.at n=29A139054
• Minimal prime with n nonprime substrings (Version 1: substrings with leading zeros are considered to be nonprime).at n=33A213305
• Smallest k such that k//A002275(n)//k is prime, where // denotes concatenation and A002275(n) is the n-th repunit (R_n).at n=24A263182
• Successive primes building the lexicographically earliest k X k 'Futility Squares' (see the Comment and Example sections for more explanations).at n=29A368051
• Prime numbersat n=664581