1867783

Properties

Appears in sequences

• a(n) and a(n)+4^k are primes at least for k=1,2,3,4,5,6.at n=17A049496
• a(n) is the first term p in a sequence of primes such that p+4m^2 is prime for m = 0 to n, but composite for m = n+1; a(n) = -1 if no such prime exists.at n=10A092120
• Numbers p such that p + 4*m^2 is prime for m = 0,1,2,3,...,10.at n=2A145741
• Primes p such that p + m^2 is prime for all m in {2,4,6,8,10,12,14,16}.at n=5A246842
• Primes p such that p + m^2 is prime for all m in {2,4,6,8,10,12,14,16,18}.at n=3A247269
• Prime numbersat n=139803