A291863 Primes of the form 43^k + 4.

5, 47, 271818611111, 1718264124282290785247, 5874403106360420018879553647, 802525857116673306810957202573831816754829436253827247, 17343773367030267519903781288812032158308062539012091953077767198995511

Offset

1,1

Links

Table of n, a(n) for n=1..7.

F. Firoozbakht, M. F. Hasler, Variations on Euclid's formula for Perfect Numbers, JIS 13 (2010) #10.3.1

Henri & Renaud Lifchitz, PRP Records

OpenPFGW Project, Primality Tester

Mathematica

Select[Table[43k+4], {k, 0, 100}], PrimeQ[#] &]

Crossrefs

Cf. A230433.

Sequence in context: A300336 A086776 A259502 * A247705 A215543 A212111

Adjacent sequences: A291860 A291861 A291862 * A291864 A291865 A291866

Keyword

nonn

Author

Robert Price, Sep 04 2017

Status

approved