A290007 Prime numbers of the form 5^k - 6.

19, 619, 3119, 15619, 9765619, 11102230246251565404236316680908203119, 132348898008484427979425390731194056570529937744140619, 2067951531382569187178521730174907133914530277252197265619, 32311742677852643549664402033982923967414535582065582275390619

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..11

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[5^k - 6], {k, 2, 100}], PrimeQ[#] &]

Crossrefs

Cf. A165701.

Sequence in context: A266052 A317029 A183516 * A119555 A107118 A251602

Adjacent sequences: A290004 A290005 A290006 * A290008 A290009 A290010

Keyword

nonn

Author

Robert Price, Sep 03 2017

Status

approved