A273940 - OEIS

A273940

Primes of the form 5^n - n.

23, 15619, 244140613

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OFFSET

1,1

COMMENTS

Corresponding n are given in A058046.

The next term has 254 digits.

LINKS

MATHEMATICA

Select[Table[5^n - n, {n, 400}], PrimeQ]

PROG

(Magma) [a: n in [0..400] | IsPrime(a) where a is 5^n-n];

(PARI) forstep(n=2, 1e4, 2, if(ispseudoprime(t=5^n-n), print1(t", "))) \\ Charles R Greathouse IV, Jun 08 2016

CROSSREFS

Cf. primes of the form k^n - n: A081296 (k=2), A224420 (k=3), A224451 (k=4), this sequence (k=5), A273941 (k=6), A224468 (k=7), A224469 (k=8).

KEYWORD

nonn,bref

AUTHOR

STATUS

approved