458924033

Properties

Appears in sequences

• Primes p for which the period of 1/p is a power of 2.at n=28A072982
• a(n) = 1 if 10^(2^n)+1 is prime, otherwise smallest prime factor of 10^(2^n)+1.at n=12A102050
• Smallest prime factor of 10^(2^n) + 1.at n=12A185121
• Prime numbersat n=24300638