A285390 Numbers n such that n + 2, n^2 + 2^2, n^4 + 2^4, n^8 + 2^8 and n^16 + 2^16 are primes.

1, 1938357, 12543605, 42052067, 42916485, 48724977, 89483837, 94041095, 94101375, 129136065, 138460937, 145198547, 153488937, 172741167, 182885915, 215999297, 217054557, 217734965, 249913685, 271516605, 277401597, 285433077, 295266797, 306256175

Offset: 1

Author

Zak Seidov, Apr 18 2017

Keywords

• nonn

Comments

Are there any n such that n^32 + 2^32 is also prime?

a(87) = 2321204055 and a(156) = 5231769977 are the first 2 terms such that n^32 + 2^32 is prime. - Chai Wah Wu, Sep 03 2020

Links

• Chai Wah Wu, Table of n, a(n) for n = 1..6400

Crossrefs

Subsequence of A192794. Cf. A070689.