A070655 Numbers k such that k+1, k^2+1, k^4+1 and k^8+1 are primes.

1, 2, 4, 19380, 285090, 337536, 448630, 532390, 534430, 545140, 547536, 585106, 602056, 677076, 876180, 1007386, 1030200, 1331950, 1462000, 1736346, 1878790, 1883856, 2071960, 2194666, 2240890, 2763010, 2824720, 3018606, 3114996

Offset: 1

Author

Robert G. Wilson v, May 13 2002

Keywords

• nonn

Links

• Jason Bard, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A070325.

Programs

Mathematica

Do[ If[ PrimeQ[n + 1] && PrimeQ[n^2 + 1] && PrimeQ[n^4 + 1] && PrimeQ[n^8 + 1], Print[n]], {n, 1, 10^7}]