1833317

Properties

Appears in sequences

• Primes of form 4*p^2 + 1, p prime.at n=20A052292
• Primes of form n^2 + mu(n), where mu is A008683.at n=29A062459
• Primes p of the form 4*n^2 + 1 such that 4*p^2+1 is also prime.at n=16A121834
• Primes of the form 81n^2 - 90n + 26.at n=17A144571
• Divisorial primes: primes p of the form p = 1 + Product_{d|k} d for some k.at n=22A258455
• Divisorial primes p of the form p = 1 + k^2 where k^2 = Product_{d|k} d= A007955(k) for some k.at n=20A258896
• Prime numbersat n=137399