80021

Properties

Appears in sequences

• Numbers k such that 31*2^k-1 is prime.at n=32A050541
• McKay-Thompson series of class 28A for Monster.at n=42A058606
• Smallest prime in which the n-th significant digit is an 8.at n=3A069596
• Primes p with f(p), f(f(p)) and f(f(f(p))) all prime, where f(n) = prime(n) - n + 1.at n=39A235934
• Number of ways of dividing an n X 3 rectangle into integer-sided rectangles, up to rotations and reflections.at n=6A361525
• Prime numbersat n=7838