157217

Properties

Appears in sequences

• Let P(x) = (x^2+1)^2+1; then a(n) is the lesser term of a twin prime pair such that P(a(n)) is also the lesser term of another twin prime pair.at n=8A093189
• Primes of the form 4n^3 + 1.at n=8A199307
• Greatest number (in decimal representation) with n nonprime substrings in base-3 representation (substrings with leading zeros are considered to be nonprime).at n=34A217113
• Primes of the form 2^r * 17^s + 1.at n=7A291049
• Lower twin primes p such that 6*p-1 and 6*p+1 are twin primes and (p+1)/6 is prime.at n=4A358202
• Prime numbersat n=14454