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

1,2

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.

Sequence in context: A186802 A179226 A166002 * A069339 A350539 A109147

Adjacent sequences: A285387 A285388 A285389 * A285391 A285392 A285393

Keyword

nonn

Author

Zak Seidov, Apr 18 2017

Status

approved