2424833

Properties

Appears in sequences

• Prime factors of Fermat numbers.at n=10A023394
• Minimal 2^n safe-primes: a(n) = 2^n*A051886(n) + 1 (a prime number).at n=16A051900
• Smallest prime p such that (p-1) has n divisors, or 0 if no such prime exists.at n=33A066814
• Duplicate of A051900.at n=16A084706
• Smallest prime factor of the n-th Fermat number F(n) = 2^(2^n) + 1.at n=9A093179
• Anti-elite primes: a prime number p is called anti-elite if only a finite number of Fermat numbers 2^(2^n)+1 are quadratic non-residues mod p.at n=32A128852
• Least prime of the form 1 + p*2^n, where p is an odd prime.at n=15A134854
• Smallest prime factor of n^(n^n) + 1.at n=3A199295
• Divisors of Fermat numbers.at n=11A307843
• a(n) is the smallest prime p such that p - 1 has 2*n divisors.at n=16A340870
• Primes of the form x^2 + 64*y^2 that divide some Fermat number.at n=2A351865
• Distinct terms in A242017, listed in the order of their appearance.at n=15A372867
• Numbers k that divide 2^(2^k) - 2^k + 1.at n=17A373580
• Primes p such that there exists a cyclic permutation of the nonzero residues modulo p such that v^2 - 4*u*w == 0 (mod p) for any three consecutive residues u,v,w.at n=29A376008
• Prime numbersat n=177975